Chevy 400, standard bore, 509 2-bolt main block.
2-piece rear main seal
Machined to fit splayed main caps, with ARP studs installed
Crack tested, cleaned, and cam bearings removed
Line-bored and lifter bores honed
Fitted with brass plugs
Bores are in good condition but will need machining for oversized pistons and decking to fit your setup
I'm only selling because I’ve decided to go in a different direction with the build. $2200, shipping available