Well i finally hit the dyno yesterday and i put down some decent numbers. With all the mods and at an elevation of around 6000ft, the truck put down 587HP,1076 on torque. on the drive home the head gasket blew. Any tips and tricks to replacing it and also a good way to clean the cooling system and get the coolant in the black? and also what are your thougts A1 studs compared to ARP? With a bad head gasket do you usually see oil or coolant coming from between the head and block? or just the coolant and oil just mix together. because i am starting to wonder if my oil cooler took a ****. Thanks for any advice.