I bought this Winters V8 quick change new for my project maybe 6 years ago, somehow a lot of things have changed since then and I no longer need it. Ive have a set of 25 inch tubes and a set of 25 3/4 giving backing plate to BP 51 1/8 and the other 52 5/8. The Dutchman axels that came with the winters qc will fit either set of tubes with a little trim. The axels are Dutchman 31 spline, early Ford 5 on 5 1/2 The winters unit is their "cog" posi lock. Everything but the tubes is new, never used. Tubes are Ford Id take 3200 for it, that's less than I've got in it. Comes with 1 set of tubes already machined for the seal, whatever width works best for you.