Here's a real nice #3919840 big block Chevy rectangle port cylinder head. No porting or grinding done anywhere. No stripped threads or helicoils either. Has new valves, guides, guide plates, rockerarm studs and springs. Complete valve job and resurface. Was run in the car a short time and ended up with a rod knock. Just clean it up and it's ready to go. Engine was parted out, have other pieces if interested