Small block mopar price check

Help me out on a value for these. 360 bare block / bare set of fully ported J castings. Leary of sinking too much $$$ in bare parts then spending 5-6k in finishing them up. Really only looking to build a 450hp mopar sb to run on the street. Thinking it may be much cheaper to find a complete shortblock and put a top end on it. Guy is looking for $475 on the bare block and 200 on the heads