I am in a pickle. My 305 TPI has already been rebuilt with 160k miles on it. The compression on cylinders 6 and 8 are getting low (22% differential from the others).

Should I rebuild this engine again (2nd time rebuild) or should I just get a 350 tpi crate engine and save up some money? I want more power but not sure about monetary situation... I can't decide. Opinions?

I am also about to move overseas to Guam and its real hot and humid and rains a lot there. Not sure how this relates to thread but take for it what you will.

 

use the 305 as an anchor for a boat, overseas of course.

and get a 350 to replace

 

305 isnt a bad motor. but once you have to tear into the bottom end on one, it makes more sense to just get a cheap jy 350 and rebuild that instead. you can fit the 305's tpi on top with a few minor tweaks.

 

I've you've got the money now.. go with the 350. You'll enjoy the HP more. But on the other note, building a 305 wouldn't really be that expensive either, considering you can buy a 305 block or even better yet the 305 HO block and heads for practically nothing.