That's interesting. Dyno sheets are too expensive for this but I'd still love to see before and after curves. I'm going to put them back in and see if the butt dyno registers anything.

Shooting for VSS this weekend. It will be my first time with the heads on the block. What tool do you guys use to supply air to the cylinder? I had planned on using my compression tester hose but then realized I don't think it will work without destroying it. Looks like I need to buy a leak-down tester and use that hose.