Hi im new here and im kinda lost with my truck. It is a 95 1500 Z71 with the 350. the truck has long tube headers, holley 660 cfm throttle bodie, k&N pipe and filter, pertronix distributor with 8.5 mm msd wires and msd coil, E3 spark plugs and an isky racing cam. o and straight pipes to the back. the truck runs great when cold but when warm it seem to shake violently and after hitting 4 grand with the rpms it drops down to 500 and fluctuates up and down alost like it is going to die. sorry for it this being so long im just sick of chasing this problem.

thanks
josh