You need to get some keith black pistons kb167 they put the piston at a zero deck height, or you have to deck the block about 80 thou, to do the same. don't put j heads on it as they have 74 cc chambers as aposed to about 64 in stock 318,s. are you a member of hemi6packs.com.http://www.hemi6pack.com/forum/show...-400-horsepower-out-of-a-318-for-3000-dollars