Clay,
This has been intresting reading, I must tell you that the experts are not always right. Just because your block has ribs on it dosn't make it a service block. I would love to show these guys a original 65 Ford Galaxie with the original 427 SO with ribs. Also I have seen other block with ribs in original cars, there are even 390 blocks out there with ribs. I do have a 72 side oiler (service block) that was cast 2H31, 1972, August 31st (it has ribs). I have heard the last blocks were cast in September of 1972. All service blocks were not inferior blocks either, especially after 1968. So I will take mine any day at least all the upgrades had been made by 72. I am sure you have a great engine and will be happy with it for a long time. Just a little info on the subject.
