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9" Rear end id, The 8" will hold up to a 351W mild build easy. If you are worried about the axles the 9" uses a 28 spline axle also. there is not many that have the big 31 splines in them.
your running 2800 rpms at 60 mph what gear are you thinking about going to. it looks like you are running a 3:00 rear gear now. The way you can get your rpms down more at 60mph is adding a over drive transmission.
your running 2800 rpms at 60 mph what gear are you thinking about going to. it looks like you are running a 3:00 rear gear now. The way you can get your rpms down more at 60mph is adding a over drive transmission.
