If you're pulling the engine from your car, then you'd need to at least pull the valve covers to get the date codes from the heads, and would likely pull the oil pan to check the crank rods and pistons. The crank can be determined from the rear outside flange, but once opened up the pink rods are obvious and factory pistons would also have part numbers inside the casting if they are still in there. Having seen and verified those parts, you would then know what you have and how original it is, or perhaps isn't?
Post some pics here of the rear crank flange, T/C and the front balancer. People can quickly tell you if they are correct parts. If you drop the pan, take more pics as more can be verified then too.
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I like solid lifter cars, big cams and cars w/ 3 pedals in them. 
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