Another (better) video simply showing it start up, free revving, putting the camera(phone) behind the car for some more exhaust sound. Looks like it still smokes when lifting the throttle. I'll check the valve guide seals when I go to change the valve springs in a few months. Can't really complain though considering it's a craigslist long block I just disassembled, looked at, then reassembled with new gaskets.
Rebuilding an OHC Pontiac 250 with EFI and a Turbo