4 bolt sbc block its a roller block just got back from machine shop had it cleaned and checked for cracks and cylinders hoyned.this was a blue print crate motor still have the paper work.bought camaro and it blew head gasket so pulled motor out to have checked out.has one piece rear main seal cast crank.rods and pistons are good.motor was 10to 1 compression with 64cc heads.i have block,crank,rods,pistons, oil pan,oil pump,timing chain cover,harmonic balancer, need the room so it has to go located 15 minutes from Chicago asking$900