Tincup's 63 Dart w/5.7 Hemi

MoparPowa said
Sorry tin, I need to borrow your mind once again.

I'm going to be ordering suspension from bill tomorrow hopefully and I need some help with some rear axles dimensions. I will be going with the fabricated 8.75 rear end from moser with 33 spline axles and the ford 9" housing ends. I'm going to be doing the magnumforce relocation kit like you did and I was wondering what your spring perch location was? Do mopar leafs curve out at the back or anything? I didn't know if the frame rails stayed straight thereafter making the leaf spring straight as well. I just need to verify my measurement.. Also, as my wheel's backspacing is different from yours and I "think" my tires are a tad bit wider, can you just give me a nod or shake on whether or not my axle to axle outer measurement sounds right? I'll list the wheel specs as well!

Wheel specs: 17x10.5, backspacing 6.8", offset 28mm(1.10")

Tires(just for kicks): 315/35/R17

Rear end measurements:

Axle to axle(outside): 54.75"
Axle offset will be 2.36" so that would make my housing dimension 54.03"?
Perches(center to center): 36"

Sorry! I'm a younger guy and this is my first time doing this to be honest..
Thanks again as usual, you are a great asset!
Ryan

Ryan, It's no problem at all. I am by no means an expert, all I can really comment on is what I have done. The best way to measure for the axle is to place the wheels and tires up under the car where they are going to be then measure. My rear measured 48" flange to flange, overall 53.5" with a pinion offset of 0.75". The spring perches are 36" however I would only get them tacked in position because you have to set the pinion angle (typically 3 degrees).
Are you minitubbing or full tubbing? if mini I would recommend your axle be at least 1.6" wider than mine, ( my backspace is 6") my tires are slightly closer to the frame than to the outer wheelhouse. (I'm considering a 1/4" spacer just to center the tire in the wheelwell a little better). I think it is better to error on the short side rather than long. It is easy to add a little, but a ***** to take away. If I were you I would go with a 55.5" overall dimension, but please double check all your measurements.
Hope this helps.