racin66coupe

im wondering if i could stroke my 289 to a 331. from what ive heard, the blocks are the same as a 302 and the earlier blocks i know are stronger. any reason to why i couldnt?

chappys4life

If your going to do a stroker use a new 5.0 block so you can have a roller cam. Crane makes a conversion cam for early small blocks but if your doing that much just get a newer block.

racin66coupe

i dont have the money for a newer block and i could really care less as to what kind of cam i have to run... plus i could use a conversion kit if i wanted to

arkight

sounds like you have you mind made up then

racin66coupe

would there be anything wrong with it though? from what ive heard the blocks are the same, this true?

tyler72

They are the same, the 289 block will work. And like you said, the earlier blocks are thicker. Why not a 347 though?

racin66coupe

from what ive heard the 331 last longer? and they also dont requre machining on the block for the rods?

1965fastback

A 331 is best for reliability due to a smaller bore, keeping the cylinder walls thicker. Also a 331 has a shorter stroke, less chance of something going haywire.

cprstreetmachines

347, 363, and 331 have the same bore.

my77stang

yeah bore is the same, but the 289 blocks are supposed to have shorter cylinder skirts so a 331 would be a better choice than a 347.

that being said, you can make gobs of power with your 289 without stroking it.... that 1000 bucks can get you a kickass set of heads