upgrading my f150
 

i have an 88 fi50 4x4 with a 5.0 efi and a 4 speed tranny. im wanting a bigger or more powerful engine and a 5 speed tranny. not sure what will fit. hope yall can help

Well define "bigger" a big 302 or a big block?The biggest you can find stock to bolt on to your existing tranny is a 351 and for all the trouble you will gain 20 horse or so and 50 ft lbs of torque.As far as I know any 5 speed from 1987 to 1996 should work.I guess be more specific on the motor so we can help you better.But I guess start with the exhaust,headers,free flowing muffler,gears help a lot,cam,intake,heads etc.

well im not sure which way i want to go. i have a 351m but i heard that wouldnt work, i have tought obout getting a 302 HO because i was told they can be fixed up more.

and on the tranny will i have to get diferent drive shaft length if i upgrade to a 5 speed

My reason for wanting this is because im am going to be using it to pull a gooseneck
with my 4 wheelers or a truck on it.

351 will fit. You will have to change some stuff. Know exhaust, not sure what else. Bellhousing is the same 300 6cyl, 302, & 351. If you've already got a good 351, I wouldn't spend money for another engine. Do know the computer may be different depending on years. Something about the firing order. If Conanski or somebody else sees this, they can answer better than me. I'm just going with what I remember reading here on the computer & firing order.

351M is a different animal from the Windsor series 302/351. 351M is part of the 335 series engines. Same bellhousing pattern as the 460.

My apologies. Thought the M was the Windsor. Know the Clevelands were C for Cleveland.

the windser will fit in a 302 spot. the 351m and the 400 are big blocks.
the 351 w will fit and bolt up to your tranny.

You can't do any more to a 5.0HO than you can do to a 5.0 truck motor, it's essentially the same motor with a different cam and intake so it would be a lateral move at best. And besideds that it's still only 302 cubic inches and you need lots more TQ than it can deliver for serious hauling. A 351w is the best candidate, throw some upgrades on it and add 4.10 gearing to your axles and it'll haul pretty good.

its a big small block.. longer stroke and small block heads. the intake is an inch bigger
but the heads are the same..