i been raceing this kind of motor for 3 years and ever thing is great love it. the class i race is super stock and can only run 4400 rpms so i been useing this engine for the low end and i can put so much gear to it and it just pulls hard. i been on top for 2 years and ever one starting to do some work to there other engines. so i wanna do so head work and milling ? is it better to mill the block little and the head or just the block or just the head the head at 0 the piston does not pop out of the block how colse can i bring the piston to top of block being the head gaskit is alum i wanna go all out on this any info is good info thanks