71 mach 1 ram air?
04-11-2008, 07:51 PM
#11
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Join Date: May 2006
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Posts: 517
RE: 71 mach 1 ram air?
Hey, thanks to evil eleanor i just realized, you said you found a ram air 351c mach 1. that car would be worth a lot, if you restored it. It would be worth even more if it were one of those rare 3spd. You should check out the door tag, and see what the trans code was, along with the rear. If it was a grabber colour, with a trac-lok rear and decent gears you may have a good find. Did it have the mag 500 rims?
If it has the factory engine and factory ram air, I'd say try to negotiate the guy down to 1500, and sneak away with a good steal.(hoping he doesn't know that it's a ram air mach1).
I'm guessing it is also the 4v heads. A nice rebuild, cam, intake, carb, and headers on it, and you could really terrorize the neighborhood. My 4v cleveland had a holley 750, an offy aluminum intake, 2&3/4 exhaust, and a pretty average cam, and it was mean. Albiet atm, it is down for rebuild. =\
But yeah, I was making plenty of power. With 3.25's and street tires(not even radials), it'd run low-mid 12's, on pump. That was with stock interior and spare, too. just removing that backseat, spare and making the interior a bit more spartan you could really see some decent track times. Althou I am more into autocross, so it doesn't impress me much, honestly.
Anyways, if it was infact 1F05M, and was indeed ramair from the factory, it would be a good show car, or even a weekend toy to help support the petrol companies. D= Either way pardon my rant. I would just love to see more of those already rare cars, back to the condition they should be.
If it has the factory engine and factory ram air, I'd say try to negotiate the guy down to 1500, and sneak away with a good steal.(hoping he doesn't know that it's a ram air mach1).
I'm guessing it is also the 4v heads. A nice rebuild, cam, intake, carb, and headers on it, and you could really terrorize the neighborhood. My 4v cleveland had a holley 750, an offy aluminum intake, 2&3/4 exhaust, and a pretty average cam, and it was mean. Albiet atm, it is down for rebuild. =\
But yeah, I was making plenty of power. With 3.25's and street tires(not even radials), it'd run low-mid 12's, on pump. That was with stock interior and spare, too. just removing that backseat, spare and making the interior a bit more spartan you could really see some decent track times. Althou I am more into autocross, so it doesn't impress me much, honestly.
Anyways, if it was infact 1F05M, and was indeed ramair from the factory, it would be a good show car, or even a weekend toy to help support the petrol companies. D= Either way pardon my rant. I would just love to see more of those already rare cars, back to the condition they should be.
04-11-2008, 08:09 PM
#12
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RE: 71 mach 1 ram air?
Their are 2 "M" engines. One is a 351 and the other is a 351 Cobra Jet. Both 4V's. Not much is known about the 351 CJ's however they are listed as being in production from 71 to 73. The Boss 351 and 429 cars are unique to the 71 model only and1512 "J" code 429's and 1806 Boss 351's were built. As rare assome of the Shelby Mustangs.
04-11-2008, 08:28 PM
#13
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RE: 71 mach 1 ram air?
Hold up. In 71 there was the 351 boss(351 cleveland 4v with mechanical solid lifters, like 11.7:1 compression[pop up pistons]), and the 351c 2v/4v. in 72 there was the 351 ho(351 boss, but with lower compression), and the 351cj (the 351c). and then i think in 73 the 351 h.o was dropped entirely, leaving just the 351cj, and the 302.
Anyways i knwo i've got it all wrong. But the 351c 2v/4v, 351 ho/351 boss, and 351cj are all the cleveland engines, just different tweaks.
But yea. The mach1 should be the 351c 4v + ram air + 4spd toploader wide ratio, and i bet it has 3.25's maybe the 3.55's? I forgot all the gear ratios it could have had. 3.00, 3.25, 3.55, 3.73(?), 3.91, and i think 4.11's. There were all sorts of variables. But i think the most common were the 3.00, 3.25, and the 3.55(3.50?) ratio's. It also pended on what trans you had, too.
I also think that only the boss got the 3.91's. I know they only came with one gear set, and that was it, but i don't recall ford really putting those in cars commonly, but i imagine it could have been purchased as an over the counter hop-up part. *shrug* We would need a real 71-73 guru to give all the in's and outs for this big mess.
Anyways i knwo i've got it all wrong. But the 351c 2v/4v, 351 ho/351 boss, and 351cj are all the cleveland engines, just different tweaks.
But yea. The mach1 should be the 351c 4v + ram air + 4spd toploader wide ratio, and i bet it has 3.25's maybe the 3.55's? I forgot all the gear ratios it could have had. 3.00, 3.25, 3.55, 3.73(?), 3.91, and i think 4.11's. There were all sorts of variables. But i think the most common were the 3.00, 3.25, and the 3.55(3.50?) ratio's. It also pended on what trans you had, too.
I also think that only the boss got the 3.91's. I know they only came with one gear set, and that was it, but i don't recall ford really putting those in cars commonly, but i imagine it could have been purchased as an over the counter hop-up part. *shrug* We would need a real 71-73 guru to give all the in's and outs for this big mess.
04-12-2008, 01:04 AM
#14
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RE: 71 mach 1 ram air?
The boss had a 3.91 the drag package in 71 had a 3.91 a 4.11 or a 4.30.There was a r code in 72 which was a boss mustang with out the name boss on it.Evil eleanor don't forget 71 was the last year drag package and big block mustang too.
04-12-2008, 01:41 PM
#15
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RE: 71 mach 1 ram air?
Dont forget in 72 the 351ho was a detuned boss cleveland. I think in 73 the only way to get ram-air was on a 2v cleveland because of new emission standards they did not offer it on the 4v.
04-13-2008, 09:18 AM
#16
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RE: 71 mach 1 ram air?
The 351CJ was a first available in late 71 and was an M code. In 72-73 it was a Q code. What made it a CJ was open chambered heads (instead of closed chambered), and a different cam profile(similiar to the 429CJ). The blocks were supposed to 4 bolt mains but it doesn't matter as the 4 bolt and 2 bolt blocks are the same in strenght.
The 72 HO was a Boss 351 with open chambered heads and lower compression. I believe the cam was the same as the Boss.
The 72 HO was a Boss 351 with open chambered heads and lower compression. I believe the cam was the same as the Boss.
04-13-2008, 10:12 PM
#17
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RE: 71 mach 1 ram air?
That sounds about right. Like I said, all were clevelands, just different things about each of them. And yes, the 351 h.o. was the boss with flat tops, and i am not sure about the open chambers. I thought it was flat tops, and that was it. But as i've stated already, unsure on all the specifics.
04-14-2008, 11:03 AM
#18
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RE: 71 mach 1 ram air?
ORIGINAL: SmallBlockFloyd
That sounds about right. Like I said, all were clevelands, just different things about each of them. And yes, the 351 h.o. was the boss with flat tops, and i am not sure about the open chambers. I thought it was flat tops, and that was it. But as i've stated already, unsure on all the specifics.
That sounds about right. Like I said, all were clevelands, just different things about each of them. And yes, the 351 h.o. was the boss with flat tops, and i am not sure about the open chambers. I thought it was flat tops, and that was it. But as i've stated already, unsure on all the specifics.
Here is a better breakdown of the different Cleveland iterations:
1971:
H code 351C-2V, two barrel engine, 9:1 CR, open 2V style heads
M code: 351C-4V four barrel engine, 10.5:1 CR, closed 4V style heads
Q code: Cobra Jet 4V 9:1 CR four barrel engine. Had special parts like high lift cam (same profile as 428CJ), dual point ignition with 4 speed, larger harmonic balancer, baffled oil pan, four bolt mains, big spread bore carb. This engine used open 4V style heads with positive lock rockers. Lower cost, easy maintenance, regular gas performance engine.
R code: Boss four barrel engine, 11.7:1 CR, closed 4V style heads with adjustable rockers, forged pistons, high strength rod bolts, crank selected for a minimum hardness, solid lifter cam, large balancer, four bolt mains, dual point ignition, special exhaust manifolds (not that you could tell by the outside), baffled oil pan, aluminum intake and big spread bore carb. This was a serious performance engine package.
1972:
H code 351C-2V, two barrel engine, 8.5:1 CR (or so), open 2V style heads
Q code: Cobra Jet 4V 8.5:1 CR (or so) four barrel engine. Same as 1971 but with dished pistons.
R code: HO four barrel engine, 9.5:1 CR, open 4V style heads with adjustable rockers, forged pistons, high strength rod bolts, crank selected for a minimum hardness, solid lifter cam (slihtly different than the Boss), large balancer, four bolt mains, dual point ignition, special exhaust manifolds (not that you could tell by the outside), baffled oil pan, aluminum intake and big spread bore carb. This was a serious performance engine package, and a low compression version of the Boss.
1973:
H code 351C-2V, two barrel engine, 8:1 CR (or so), open 2V style heads
Q code: Cobra Jet 4V 8:1 CR (or so) four barrel engine. Same as 1972 but got the 2V sized valves in the 4V heads. Cam was retarded in timing 4 degrees sometime starting in 1972. The change is in the cam. It gets an EGR system. Only 4V Cleveland engine option in 1973/74.
1974:
Same as 1973. No 4 speed option so no dual points for Q code. Last year for the 351C. In 1975, the taller deck 400 would used with a destroked crank and different pistons to make the 351M. The 400 continued with the 351M until 1980
H code 351C-2V, two barrel engine, 9:1 CR, open 2V style heads
M code: 351C-4V four barrel engine, 10.5:1 CR, closed 4V style heads
Q code: Cobra Jet 4V 9:1 CR four barrel engine. Had special parts like high lift cam (same profile as 428CJ), dual point ignition with 4 speed, larger harmonic balancer, baffled oil pan, four bolt mains, big spread bore carb. This engine used open 4V style heads with positive lock rockers. Lower cost, easy maintenance, regular gas performance engine.
R code: Boss four barrel engine, 11.7:1 CR, closed 4V style heads with adjustable rockers, forged pistons, high strength rod bolts, crank selected for a minimum hardness, solid lifter cam, large balancer, four bolt mains, dual point ignition, special exhaust manifolds (not that you could tell by the outside), baffled oil pan, aluminum intake and big spread bore carb. This was a serious performance engine package.
1972:
H code 351C-2V, two barrel engine, 8.5:1 CR (or so), open 2V style heads
Q code: Cobra Jet 4V 8.5:1 CR (or so) four barrel engine. Same as 1971 but with dished pistons.
R code: HO four barrel engine, 9.5:1 CR, open 4V style heads with adjustable rockers, forged pistons, high strength rod bolts, crank selected for a minimum hardness, solid lifter cam (slihtly different than the Boss), large balancer, four bolt mains, dual point ignition, special exhaust manifolds (not that you could tell by the outside), baffled oil pan, aluminum intake and big spread bore carb. This was a serious performance engine package, and a low compression version of the Boss.
1973:
H code 351C-2V, two barrel engine, 8:1 CR (or so), open 2V style heads
Q code: Cobra Jet 4V 8:1 CR (or so) four barrel engine. Same as 1972 but got the 2V sized valves in the 4V heads. Cam was retarded in timing 4 degrees sometime starting in 1972. The change is in the cam. It gets an EGR system. Only 4V Cleveland engine option in 1973/74.
1974:
Same as 1973. No 4 speed option so no dual points for Q code. Last year for the 351C. In 1975, the taller deck 400 would used with a destroked crank and different pistons to make the 351M. The 400 continued with the 351M until 1980
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