340 High Compression Pistons

You're very welcome. I hope you have fun in the SEGA... it looks like a blast! The 3 classes makes it nice. And the high SCR makes sense now... a big cam and high revs for pure HP on the strip. These recessed heads may have actually worked out for you in this high SCR use.

Let me know if you have any Q's or find anything odd... I've been over this a coupla times now, looking for any mistakes. And, be aware that if you wanted to use a taller head gasket, like a Felpro 1008, then the .012" increase in head gasket thickness can be matched by a CH increase of .012" to keep at the same SCR. I just figured that limiting crevice volume is a good thing. But the 1008 may make things easier in terms of head and block surface finish, and the 1008's would be cheaper too.