[Jersyboyy]

Double verify the rear end and tranny. Does he have paperwork on the rebuilds of those components?
If all goes well DEF stroke the motor out go forged just incase you decide to spray down the line
Hell if you have the cash pick up an ls1(seen one on craigslist complete for 1500) stroke that out and slap it in
& That is a great deal imo if, like said before, the tranny and rear are in good order.