Josh, you need to pull the heads off to get an idea of what piston height it has and if there is valve reliefs cut . Unknown bb should be considerd as a core engine, if he doesnt know anything about it himself. Crank macnine work for bearing size? Cast or steel? 3 bolt or single bolt solid or hydraulic? Sometimes you get lucky, and LOTS of times you are getting a thrown together ball honed re ringed block, used cam and worn out lifters. You ever notice the engines I sell ? I make sure someone is getting good parts if it is 1500 and up. Your in Colorado, so make sure the block hasn't been frozen and cracked under the intake. Just don't pay a premium price for a specific year, that only works for date codes and numbers match stuff
500-700 long block would be max to me
