Well for now I have engine quest vortec heads with 1.94and 1.5s unported, 1.6/1 roller rockers, elgin 327/350 horse cam, performer rpm, holley 700 double pumper, Jegs street spark hei. The shop who built it told me that the engine made around 10 to 1 compression. The engine has like 30 miles on it. The reason I ask how much power the bottom end can take is because later on, after I upgrade the t5, I will probably want to have some head work done and possibly a bigger cam. I just don't want my engine to fail prematurely.