Hi I've got a long winded question concerning piston to valve clearances. I know claying is the way to accurately measure, but looking for experienced opinions for now, until that process takes place. I have a GSR head going on a GSR block with LS crank/rods and B16 pistons. The issue is the head had previous damage and has had to have 20 thou removed "since I owned it" so I would assume it had maybe 10 thou removed b4 I bought it. Is .30 too much with B16 pistons and stock B16 cams in a Gsr head. As well the block has a block guard so its been decked as well. Sounds kinda tight but I have no experience with how much clearance there is to begin with. Zealworks compression calculator says about 12.5:1. Thx for any input, Cheers.