lookin to do a frank motor but not sure what block to use, B18b block with B18c head or B20 block with B18c head. i think that with the b20 block and b18 head its gonna be a high compression and i don't want that im lookin for about a 9 to 1 or so, so i can boost it pretty good. whats the best combo.

 

B18b block with B18c head.

stick with the LS block, it loves boost

 

"loves boost" well thats what i wanted to hear thanks dude.