273 commando Build

Plymouth 65 said
That's correct, I'm not certain if there's a difference between the 315 head combustion chamber cc's and the 920 head combustion chamber cc's. 65'

920 are around 67 cc, maybe a smidge less.
315,920... same closed chamber.
The pistons were designed to work with them.
Use a performer intake if you can't find a ld4b