Based on what the Florida B said, you might have to bore and hone the block for your pistons and check the deck height before decking the block. It looks like he took off less than .050". As far as the intake faces, you can't cut the intake face on the head into the valve cover bolt holes. The good part about cutting the intake face is that you reduce the port volume. NHRA lists the Minimum Compression Height for these pistons at 1.900". I think the TRW piston is around 1.915" if I remember right.