Im running 7lbs boost 356 hrs commpresions 165 -160 every cylinder on stock bottom end I run good fuel and keep it cool .I had the heat exchangers made to 5-1\8 I can run full throttle for 11 minutes before I see heat.when it starts to get hot, about 2000 yards negitive boost it cools right down.33 outlaw twins.Sorry to hear about your missforune.Your new motor will be smokin. Dustin can get you the heat exchanger.Ihad 2long blocks put together with the same cam as your new motor,and all the other good stuff . the swap starts may 1