smokee23

Hi, I want to install a 351 Windsor engine it is a 1974 model and I have a 1970 fastback will it slip right in without modifications? what is the last year that 351 windsors will fit? Thanks for any feed back
smokee

dcohen

what type of transmission? i think it should work, a 351w is a 351w

JMD

It will fit, will need the 351 brackets for the alt, A/C PS, etc.... I think you will need a 351 flywheel and balancer as well for the right imbalance. (or are early 302s 50 oz. ?? I don't think so..) Your exhaust manifolds should work, or if you have headers they might work.

All of the above assuming a 302 is in the car now.

Mounts and most other parts are the same, 302 intake manifold wont work.

smokee23

Maybe my question should read; what yearwas there a change from the 351 windsor that came in 1969 mach 1 to the newer engine/ electrinic ignition. I have a chance to get a 1974 windsor and seems like there is a change around 1972 or 74 to where it is more of a pain than using the "early block)

JMD

There is no real difference between an early 351 and a late 351, up through 74 it is the same engine, you should have no issues.

Even the last 351 W produced (1982?, 1988?) will bolt in with minimal issues.

Colorado_Mustang

The emission heads showed up in the early-mid 70's. Engines were detuned starting in '72, all in the name of emissions. Other than that, 351W's are basically the same.

smokee23

Thank you for the infomation
smokee

petec

If you are talking about putting a 351W into a 1974 Mustang II, it will fit but she's a tight squeeze. I did one in 1986 for a buddy of mine and we used headers for the 302.

Not sure what change you are talking about on the 351W. The deck height changed from 9.48 to 9.5" in 1971, I believe,but that shouldn't impact what you are doing.