What kind of power?

Leadfoot said
I'd need a hair more info on the pistons before I venture a guess.

kb only makes one piston...for 340...kb 243....1.84 compression height..

https://www.uempistons.com/index.php?main_page=product_piston_info&cPath=3_4_22&products_id=522

any guess is as good as anyone else whether you know the specs or not........lol