Need taller gears for my 62 Posi

[RustyCrank]

I have an original 3.90 Posi in my 62 and need to know if the lower ring and pinion gears will work with my posi unit. There were 2 different ratios offered in that year and it looks like non posi came in either 3.30(?) or 3.90 and cant imagine the carriers being too different as they both fit the same housing. I know the old Ford 9" route is an option, but just spent a pile of dough on the wife's 56 Nomad makeover and need to keep this as econo as possible....

Anyone done this swap?

Attached is a pic of the housing