I have a 440 six pack, iron block, aluminum heads and the motor will not idle without having it warm up first so I have to feather the gas until that happens, 5-10 minutes....a real pain none the less. The builder said since it's after market it doesn't have the heat runners for the mechanical...
I want to adjust the drivetrain and stiffen the suspension to go from a 383 to a 600-700hp Hemi mostly for driving on the street, maybe a few passes on the strip once in awhile.