I ran the DP Stg 2 65 stock w/modded pump until I blew a head gasket/cracked a piston. We built the motor, ran the 65 until iI decided that I needed more air for the fuel that was available (45%/10mm). I then switched to the DP Stg 2 68.
The 65 is way more responsive, and will do 700 hp w 1350...