I have a 255 (4.2L). The original Stats are 3.68 Bore x 3.00 Stroke, rated at 119hp.

Can this be built as a stroker? Is there really 1/2" of cylinder wall that I can bore out to make it a 302, or is this a different block?

I'm not trying to build a 9 second track car...just something that has more horses than my Focus!

The original intent was just to put this in the car to work out the bugs in the suspension and save up for a crate roller motor. But I'll build this one if parts interchange will work...

Ideas? Suggestions?

 

Its *techincally* the same block....255 is a destroked 302 (not bore)....but....[opinion follows]

Id avoid the 255 like anthrax. One of Ford's worst ideas, evah. A machinist buddy once showed me where, in order to save weight, the 255's crank is partially hollow!

Where else might they have 'shaved' weight, methinks?

Get another version/year of the 302 and start from there. [/opinion]

 

I appreciate you opinion.

This particular design seems to have been what they tried to "save the V8" with. The heads were supposedly redesigned for better fuel economy and less emissions.

One of the performance mags did a build up, and their results were minimal. Granted, this was in the early 80's.

I'll just leave it as is, put it in and get the car back on the road. That way, all the bugs are worked out for when I put the "real" motor in it.

Thanks again!