350 block casting number 3970010 2 bolt main 40 over not a fresh bore but looks to be fine no ridges at top of cylinders. Also have a 14010207 350 block standard bore needs to be bored been sitting in shop. Have several sets of heads casting numbers 993, 487, two sets of 624 and one of 041,291,186 would like to sell all together but will separate. located in Panama City Fl. all the heads will need to have valve jobs make a reasonable offer or will do some trading.