Your neighbors 57 235 motor would fit without too much trouble. Water pump clearance is about the only issue. I price a motor I am buying as if it needs to be rebuilt unless it is running to show otherwise. $100 is a good place to start.
Grant 1950 Chevy 3100 1952 GMC 150 (In Pieces) 1968 Chevy K20 1966 Shovelhead 1978 BMW 100S