new here and i've got a trick for ya'll
i'm using factory wheels with a 5/16" spacer behing them to allow them to clear the calipers....same trick we used to use back in the days for converting your drum front to disc. so the center flange was fine, the only interference was the calipers.
the brake porportioning has not been an issue for me. i haven't had any killer stops yet though! i may get that summit proportioning valve in the future, but for now it seems good. i guess i need to out an empty parking lot and try it out.
the ring gear is the FORD 8.8". look at summit or ebay and check out the stuff out there for 'em!
i don't have the exact measurements, but the 8.8 i have is 3" wider than my 8.25 i took out. (from BACK of brake plate to BACK of brake plate.) being drum to disc, i think the Wheel Mounting Surface (WMS) will be closer to the same between. i will take the measurements you need @ the shop tomorrow.
its a great looking rear end, too. i'll try to take some pics too.
sb