[masterbeavis]

I would say that since your truck is not a car, nobody will care about numbers matching mumbo jumbo. Wrap your old parts in Cosmoline, shove em in the shed, slap in the big block, spend the same money on the engine that you would have spent on the 350/383, and enjoy even more power at the same price. Head porting, stainless steel valves, roller tip rockers, good low end torque camshaft, better gears, an overdrive unit to keep the rev's down, the list goes on and on. My vote, save your money and go big block