Rear Thanks

If you're staying with a SBP then you don't need a 489 or 742
Whatever, I'm having mosier narrow a Dana 60 if I don't find an 8.75 and drill it for sbp. 30 minutes from me. Already done 2 60's for me. They said it take easily over 600 hp with upgraded studs and the fairy tale of breaking wheels off is just that..... Unless those used are rusty old bad wheels. I'll take their opinion. Thanks...