You looking for something that would be kinda stock, they put the 4-71 Detroits it those trucks back then.
Looking for something newer, well do just that, find a diesel powered truck, like a mid 80 size tilt cab.
Your best bet is to find a truck with envery thing you need, it will cost less in the long run and you know what to tell them at the parts house when you need to go for parts.
