Whether or not this is what you finally set it to but this is how my moose is set. It is 4.5° positive caster and .5° positive camber. And toe set to ford spec. I kept the angles that wear tires with in spec and caster raised to help push the steering axis towards the rear of the car, increasing the caster. How ever, if you want it to drive straight, have your car compensate for the road crown, id set the drivers strut about .2°-.4° less than the passenger side. So if you go 4.5° on passenger, then the lowest recommended is 4.1° if you dont then the road will just pull you to the right thats all. It will not affect it too much to have it at 4.5° both sides, thats what mine is at.
If i remember correctly you said your frame was bent right? If your taking it to be aligned and they use a hunter machine then tell them to verify the SAI(steering axis inclination) is correct. I believe mine was at 14 but i cannot recall. This just makes sure the frame is straight and there are no bent or damaged components. It would suck to get everything put together only to find out it cannot be aligned properly due to what ever caused damage to the one side of your vehicle. Good luck keep us posted.
19 GT PP1
65 GT A-Code Mustang 289
66 GT A-Code Mustang 289