Making power out of the 318

carmart1975 said

so i recently got and 1973 small block 318 i am very new to mopar and was wondering what to do to the 318 i have every thing but the pistons the guy that i got it off of droped one and cracked it, i also have 360 heads that i would like to put on i am thinking about putting kb 167 pistons (0.40 over) in it, stock crank, stock rods and a rad cam with a lot of lope because i am a stupid kid, and stock 360 heads and then some kind of single plane intake and then a 750 double pumper i am really on a tight budget. is all of this possible or unrealistic.

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I only read your post and will tell you to treat it like a 340.
Replace the piston or a new set, the new set should be the KB pistons with a dome for some compression with an open chambered head . I myself like to ounch out the bore as far as possible on a 318. Sonic check it first. Then use a cloased chambered head (Edelbrock for example annd probably with a flat top piston and cam as needed.

Go here for a compression ratio calculator;
Compression Ratio Calculator - Wallace Racing

The 318 can not be bored out to a 340 (4.04 bore size) but may, MAY Sonic check good to a 4.00 bore. That would be 332 cubes. If it only goes .060 overbored, it’s a 327.

Grab the “How to Rebuild a small block MoPar book(s) and go from there.

Have fun