[Silversmith]

If it's a post 67 block, it will not carry the same value as a 65,66,67 sideoiler NasCar block The 65-67's were designed to run @ 7,000+ rpm all day long. The 65-67 blocks were known as bullit proof blocksl, because they would & did run @ 7K++ rpm during races. After 67; the service sideoiler blocks showed up mostly in trucks & other heavy duty equip, & would accecpt roller rocker, unlike the NasCar blocks wich were flat tappet designed only. The service blocks would also max rpm out @ about 6,500 rpm & never produced the kind of power the older blocks did. Thus they don't carry the same value as a older model block. IMO; I would perfer a early 427 center oiler over a service block. The metal content of the post 67 blocks just doesn't match up to the older blocks. Good luck w/your sale.