Sorry to hear that dude, it sucks, I know…
Had something similar happen TWICE to my brother and the BB that was in his truck… first time the shop “forgot” to clearance the pistons to the cylinder heads so they were ever so slightly tapping each other… 5 minutes and 8 bent piston pins later we got to pull the motor right back out…
Second time… one of the roller lifters seized and ate the cam lobe right off…
After that, he just grabbed my BBC that I had sitting in storage and threw it in his truck and that’s rocked for the past 7 years in it.
Oh… and pulling the motor out of his truck isn’t as easy as most… seeing his hood line in 6’ above the ground… Need an overhead gantry to pull the motor!!