I have a question for those who have been down this road before. I am going from a 3:73 limted slip 10 bolt rear with drums to a 3:27 Posi 9 bolt with Disc, Aluminum drive shaft, and swapping out my old shot T-5 for a used one in working order. So the big questions i have are first, because i am going down from 3:73's to 3:27's, (and the rest being the same) what speedo gears do i change out to get that right? also does anyone recommend a good company that makes performance or aftermarket U-joints? I figure if I am replacing all of this at once, do it right with the right parts...

Also on the speedo gears, when its figured out what i need, where is a good place i can get those from also?

I plan on changing the rear springs, and shocks and rear brakes during this episode also, but i already know what i am doing for that...

Also, if anyone has any suggestions, or recomendations of this project, i am all ears!

Thanks

PS: Also, I am thinking about cleaning up the rear end, its nothing too bad, just the normal rust and corrosion from a IRON rear end... anyone have any suggestions without breaking the bank?