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I6 to 351w EFI question???

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Old Aug 7, 2007 | 02:12 AM
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Default I6 to 351w EFI question???

I have two EFI 351w engines. Both not running out of either a 90 bronco or a 90 F150. I am just curious what i would need to do to put either of these in my 67 coupe that currently has the I6 in it. I will want to keep it carbureated and lose the EFI. I am under the impression that that is just a matter of putting a different intake and carb on it???? I am not sure that I want to make the jump to V8 or that this will even work without significant mods. does anyone have any experience or off hand knowledge about this swap. I just want to weigh all my options before i jump into anything. I figure they aren't doing any good just sitting around. the I6 runs good but rebuilding the 351 would give me something to do this winter. Also, what tranny would be good to sit behind that if and when i do decide what to do? any other mods that anyone knows of for sure????

Kevin
Old Aug 7, 2007 | 02:20 AM
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Default RE: I6 to 351w EFI question???

Suspension i dont think would be able to handle that big of a weight increase very well at least, and maybe breaks if you only have drums and no power brakes. Thats what i would consider i was just thinking of putting a 302 in my L6 mustang, and what i kept hearing is One suspension, Two transmission, 3 Brakes. And then of course bigger radiator.
Old Aug 7, 2007 | 02:32 AM
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Default RE: I6 to 351w EFI question???

you need a 8 inch or 9 inch rear end v8 spindles hubs brakes springs shocks in the front.you need v8 motor mounts and brackets radiator some wiring and plumbing.
Old Aug 7, 2007 | 05:51 AM
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Default RE: I6 to 351w EFI question???

I have a 1990 Ford bronco sitting behind my house that has one of the motors in question. Would the rear end on that work. I think its a 8.8" (I could be wrong). could some of the the other parts transfer over as well with some slight mods?
Old Aug 7, 2007 | 06:11 AM
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Default RE: I6 to 351w EFI question???

yes its a 8.8 if you can weld and shorten it then yes only bolt in ones are a 8 inch or a 9 inch cheapest ones id buy are from is http://www.perogie.com/Rears.htm
Old Aug 7, 2007 | 09:28 AM
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Default RE: I6 to 351w EFI question???

I had an I6 '67 T code.

I swapped out a 5.0 into it, but left it carburated (wish i had done EFI)
I drove it for over two years on the stock I6 suspension before rebuilding it. from all of the research I could do, the 67 was the only year that diddn't change suspension from the I6-V8.
Though it would be wise to check the weight difference between the 302 block and the 351, just to be sure.

In other news, I have a 67 with a 351 and a C4 transmission. the motor was replaced in 68 and the tranny was left stock. It leaks about as much as a 40 year old tranny should, but no other problems than that. I also used an I6 C4 for the 5.0.

The rear end in my 5.0 swap was left as an 8 inch for that stock 5.slow

so, Compare weight between a 1992 5.0 and your 351
and then compare HP between a 1992 5.0 and your 351.

if the numbers are close, id go for it.

Old Aug 7, 2007 | 07:15 PM
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Default RE: I6 to 351w EFI question???

would anything else off that bronco be useful to keep around for making the swap? I am gonna tear both of the 351's down here in the coming weeks and see which one, if either, would be a good candidate for a performance rebuild. I am gonna make the switch to the carbureater on the 351. fuel injection can be a headache and i don't want to get to crazy with this baby. just some more muscle under the hood will be fine.
Old Aug 8, 2007 | 02:36 PM
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Default RE: I6 to 351w EFI question???

Does the8.8" have disc brakes? if so, you could ****** that out and use it.

are the EFI parts in good/workable condition?
Old Aug 8, 2007 | 03:52 PM
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Default RE: I6 to 351w EFI question???

ORIGINAL: kj1977

would anything else off that bronco be useful to keep around for making the swap? I am gonna tear both of the 351's down here in the coming weeks and see which one, if either, would be a good candidate for a performance rebuild. I am gonna make the switch to the carbureater on the 351. fuel injection can be a headache and i don't want to get to crazy with this baby. just some more muscle under the hood will be fine.
How wide is that rear axle in the Bronco?

Hmmm.

The swap was not hard on my son's 66, it should be eveneasier on a 67, as it is my understanding that your front end is the same as a V-8 of the same year with the exception of the springs and maybe the sway bar.... I am sure someone will correct me if I am wrong about this...

No matter the width of the axle, it couldbe narrowed, and I am betting it is a 9"....... Even if you did not narrow the housing, you could purchase a new housing with the axles from Currie for not too much, and use the Bronco third member as it is,, if it is the 9" that I thinkit is....
Old Aug 8, 2007 | 04:18 PM
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Default RE: I6 to 351w EFI question???

the EFI parts on both engines are still in good working order. One being a little superior to the other. The Bronco rear end is an 8.8" and has drums on the back. Is the E4OD under the bronco to big to work on the mustang? I know that thing is a pig but it only has 3k on it after a ford dealer rebuild. I have also come across a performance rebuilt 302 (not sure how much performance just yet) here in town for $1200. I don't know the guy so don't have any idea if he is legit or not. would that be a better deal do you think? I am mostly looking for a winter project while this car won't be driven anyway and i can tear into it and not want to be driving it. I did a ton of reading on the 65-66 351w upgrade and apparently there are some space issues fitting it under there and getting to the plugs etc. after the headers are installed (which some had to have modified to get to fit). I haven't picked up anything that deals with the 67 upgrade. is that because it is much easier and had the same front end as the V8's, minus suspension? Please say yes?????



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