I couldnt help myself and went and looked at it yesterday, and bought it. It was obvious that all the internals were new at the time of the rebuild and that there had been extensive machine work (bored, and balanced, and rebuilt 915 heads. It also came with a brand new performer RPM intake and a brand new Mopar electronic ignition conversion all still in the boxes. He also threw in the engine stand it was on. We haggled a bit and I think I got a good deal.
I will take it to a machinist to be sure everything is good to go.
Thanks for the advice, hopefully this works out in my favor.