Okay, i bought my truck 2 years ago, its my first vehicle. the guy told me it had a 1/4 mile racing cam in it. I did a compression test and all of the cylinders read 123-125psi. The 400 motor has great horsepower but is weaker ont he torque side. I recently installed Crane hi intensity lifters (to bring back low end compression and vacuum) , crane roller rockers 1.5 ratio and a shift kit. since then the power is gone, i can hardly keep it running, and its extremely hard to start. can anyone help??