Mock and trial fit with a number of different spindles.
On the left we have a granada spindle, then a Wilwood 2 inch drop spindle, Ridetech 2 inch drop spindle, and of course the stock drum brake spindle.
I plan on running a 18x10 inch front wheel with 6.6 inches of backspacing. This is a common aftermarket mustang rear wheel and can be had cheap.
This introduces all sorts of problems as the ball joints and tierod ends have to fit inside the wheel in order to have the get a decent scrub radius.
this is the Ridetech spindle which has the best fit however, it would drop the front 2.7 inches and is tough to find a steering arm that will work in a rear steer setup. I have slight reservations about the pin size as well which is the same as a stock Galaxie pin but slightly shorter.
This is the Granada spindle, which is what I'm leaning towards at this point. It has the bigger spindle pin and a built in steering arm. I already have a brake kit that can be adapted to fit which will save me quite a bit of money.
I am going to go with a adjustable upper control arm with parts souced from SPC. I plan on fabricating a lower control arm that will be 1 to 2.5 inches longer then stock to move the wheel out and make up for the wheel offset.
I spent a few nights out in the garage measuring and mocking up my existing suspension, boy there is a lot of room for improvement!