I have a January 1968 BBC 396 4 bolt main block I purchased to build as a back up motor. It came out of either a Nova or a Camaro- Its an MQ block. Its a standard bore, come with forged 6228 crank, 8 inch balancer. Has windage tray studs but I also have standard bolts new. Block and crank have been magged and are clear. It's been sitting for a while so they have a layer of rust but block can be easily bored and crank easily turned. Call or text at eight 1 eight 3 nine 9 zero 8 one 5.