not to sound like a A$$ but for 1800.00 shipped to your door it gets you a ready to drop in long block 290hp vortec roller cam 350 brand new from gm .
https://www.ebay.com/itm/GM-OEM-NEW-...4AAOSwysRas9qX
rebuilt engines at local machine shops have been hit and mostly miss these days anymore .
i got the vortec 350 for my current build . spent 250 on a nice edelbrock intake could have went super cheepy if i wanted to save 50ish bucks . then a 30ish buck new flexplate and dist gear to work with the roller cam and she is ready to run .
good luck on the local guy and hope he stands behind his work .