I have got a 5.0 HO in a 1949 f-1 pickup, i have built the engine with the trick flow top end kit, twisted wedge heads, new 70mm throttle body and egr plate. 24 lb injectors, new fuel pump, adjustable regulator, msd box new 8.5 wires, plugs, the list goes on. I am having a problem while revving the engine, it will start to rev fine when it gets to what sounds like about 2000 rpm it starts shaking and kind of popping out the exhaust. I have had it to 2 different guys and they burnt a chip and still can not get it out of it. Anybody ran across this before?? Possibly its a mount or balancer? i had the truck running with a stock 5.0 HO in it before. And it ran like a top. no problems. anybody got any suggestions as to what to check or what could be wrong with it.