'95 F-150 track ready street beast

[wfo guy]

I'm late to the party. In case you don't know, the Mustang rear doesn't have a centered pinion. You haven't mentioned how you are going to brace the front chassis around your suspension. The truck frames aren't capable of sustaining twist without substantial crossmembers. There is a reason most of the aftermarket crossmembers have 2 x 4 tubing bent for the center brace. If you have access to someone with finite analysis, you might consider some stress calculations. I'm sure you want to be safe.