Im looking at semi-building a b16a engine. I have the RS Machine 81mm (ctr spec) pistons and have the concern of valve to piston contact. Im looking into blox spec b cams or something else out there. skunk2 is out of my price range tho id like to have a set of pro 1's.

Any input on blox b's or a's on this piston combo would be appreciated..

 

Blox A's or B's translate to Skunk2 stage 1 and stage 2 cams respectively. If you're going to build that engine and do it properly you're going to want to go with 81.25mm or 81.5mm pistons and have the block bored out to match. Unless you literally went crazy with milling or decking or cam gear settings, P2V is not a concern.