9" rear in a jailbar truck

[GB SISSON]

I have been reading a thread tonight that goes into quite a discussion about the problematic axles in a banjo rear end. I have read tales of sphincters tightening as nuts are twisted, wheels with drums flying into oncoming traffic, threads stripping, cracks appearing, keys shearing and then going through it all again if you'd like to check out your brakes...
Ever since I built and installed a 276 flathead mated to a T-5 in my truck based woodie wagon I have been thinking about completing this powertrain 'upgrade' with a 9" 4:11 rear from a '57-'72 Ford 1/2 ton pickup. IIRC this is a simple and direct 'bolt in' to my jailbar springs and driveshaft. I see there are quite a few guys on CL and Marketplace who sell these and seem familiar with inspecting and general overhaul. Since my woodie is far from being an original anything, why would I Not want to go this route? Right now, all seems fine, but I can now go 70 on the interstate and seems like a good move for piece of mind as I venture further from home in my 'semi-retirement' phase. Thanks, Gary