[BR3W CITY]

My .02 (keeping in mind I dont know 100% what is offered for IFS from all the vendors);

If your looking at a 9" rear, than an MII based front would typically keep the Ford pattern for wheels. IMO it is easier to change the pattern on the rear vs the front, since you can always get custom/redrilled axles.

If your looking at staying with a 12bolt, I'd agree with PGSigns and say that the 70-80's 5x5 is the easiest all around in terms of donor parts and putting something together.

The only thing I'll say for 5x4.75 is that you'll find a much larger selection of wheels for a bit cheaper, since it was the standard for GM for so many years. 5x5 can be a touch trickier to find certain wheel styles, as some manufacturers don't do full line 5x5 wheels, or limit the styles they offer it on.