I checked clearances and I had plenty of room still I was expecting to have to use a thicker head gasket, but remember I'm still on stock cam but with my homemade ratio rockers 1.27 intake 1.24 exhaust. So .283 lift on intake, .286 exhaust. I should pull the head and verify everything again but like I said I still had plenty of room when I checked before. I know some people throw 14cc heads on and probably a longer rod, and definetly need to fly cut the pistons for good valve spacing. I fly cut mine just to be safe.I get the same compression ratio in my spreadsheet, but I was wondering, with that gasket thickness and that deck height, isn't that a little thin?