JERM_1967stang

ooo its ok. i apriciate your help. But do i need a new drive shaft (shorter, longer, yolks) also are the 5.0 heads better then the 67's 289? and what kind of cam/ lifters / rockers does the 5.0 and the 289 have?

gothand

IMO, pulling a 60K mile stock 289 for a stock 5.0L that you are going to convert to carb just doesn't make much sense. If you were converting to EFI I'd say have at it, but if you're going to stick with a carb, the benefits won't outweigh the cost and effort. BTW, the 5.0L motor doesn't have an eccentric for a mechanical fuel pump so you'll either need an electric or you have to pull the timing cover and add one.

The only thing that would make even less sense is pulling apart both working engines and putting the 289 rotating assembly in the 5.0L ... FTMFW. BTW, don't you have to have the crank machined down to run the one-piece seal? $$$

Jeff

JERM_1967stang

well damn just pull me apart. Well Im trying to make a mild street/strip build for lowest money possible. i figured the the 5.0 has a better cam lifter setup over the 25 years prior to it. also more cubic inches means more power am i right? and the heads are better am i right. should i just get the engine put the 5.0 heads on the 289 and then put a new lifter cam setup?? then if i did that id have to get the block mill and bored to straighten up the piston walls and such

jlp66stang

The 5.0 has roller rockers. A lot of people are going to that. Is it a HO 5.0. It has a GT cam. You can get a dual plane intake and 4bb carb, use the distributor out of the 289. Your transmission will bolt right back up. If you are going to run a v-belt pulley system, you have to change the timing cover, water pump,pulleys and brackets. The fuel injected motor doesn'thave a place for the engine driven fuel pump. Water pump discharges on the wrong sidefor you radiator, I think. I ambuilding on of these for my 66FB. Ibought GT40P heads, supposed to have better flow, but you have to run headers. Itgets into a lot of stuff, worth it or not?

JERM_1967stang

well i have the entire essembly full engine-trans its still in the car so would i need to still do that pulley crap? or the distributor swap and crap. what kind of rockers are in a gt-40 head? rollers right? so if i was to tear apart the 289 put a new roller cam and lifters then new rods and the heads will be set right? and a new carb/intake and that should put me around 375-400 hp right??

jlp66stang

Depends on the cam and heads. You will have to spend some money to get that. You want to melt the asphalt, not drive on it. If you want a driver, just put a intake and carb. The pulleys and timing cover are not that big a deal. Need to put a new water pump and new seals in anyway.

JERM_1967stang

well let me know some opinions on the whole thing what would be the best way to go about it. drop the entire engine trans setup in and convert it to a 5.0 and a few more mods or rebuild the 289 and mod it up? remember cost is a factor and im not trying to restor nor make his car worth more

68EFIvert

If cost is a factor keep the 289 and put in a new cam (will be cheaper than the 5.0 roller cam), put on a good intake (Weiland Stealth, Edelbrock Air Gap or RPM) and a 600 cfm carb. Put on a Pertornix or what ever it is (remove the points) and get some good wires. Put on some headers with free flowing exhaust. Adding these simple add on's will give you a respectable performer and still be able to drive it when you want.

Later on look at some good heads (AFR 165's) when funds improve. By the way 5.0's don't come with roller rockers from the factory, they come with roller lifters.

One last thought, the gearing of the car will have a lot to do with how fast it feels. 3.50's seem to be good all around gears.

mat11089

Not all 5.0's have roller rockers.An H.O would be a full roller setup and would have them though.I say since you already have the car and are set on doing this use the whole EFI setup and all since you have it.

onegreedy

congrats you just went from a 289 to a 302 thats a whopping 13 cubes there

if your gonna swap it i woulf go all the way with efi and such!