Specs

I'm calling the +.010 a 362. I looked at those Clevite pistons last night and they both look different than yours, but closer to the U.S. slugs. I'm thinking that Clevites and Sealed Power are private labeled by Silvolite.

I consider the Comp High Energy cams old school. They've been around a long time. New school would be these "fast rate" grinds like the Xtreme Energy and Lunati's Voodoo, and of course just about any current roller grind. It's just funny how several guys I know and I had never heard of broken end shafts until the last few years. I wound the piss out of my old engines and never had failure one. Now, end stands are "required" all of a sudden. Something ain't right there. For fun bracket use, I'll stick to proven parts. I'm not looking to set world records here.

Anyway, I have a pair of EDC heads that may or may not have small chambers. I have to yank them and check. If they are not small, then I need to be on the lookout for some C0-D's or C3-C's or something. I'll figure it out.

I agree that the 410 piston would be a little lighter than a 390. I'm gonna go snag a scale and see what values I can dig up. Of course, I'm trying to avoid balancing if I can match up the bobweight close to original.