4" to 4.5" Bolt Pattern on a 7 1/4" Rear?

Do not use the old style cast aluminum adapters-good way to wipe out your rear quarter panels if they break! Not safe at all. I saw a 70 duster that had used them years ago, one side broke or came loose causing lose of tire-major body damage and a wild ride I'm sure! I think the new billet ones are alot safer, I hope! Just my 2 cents worth! Myron