Mustang Underbody Dimensions (long)
I have a '65 Fastback that needs new sheetmetal and a new rear framerail. I am leveling up the chassis according to the original underbody dimension ( I only have it on jackstands at this point, but adjusts the height front to back to get the measuring points lined up with the Baseline, which is my garage floor (it's pretty straight)). I will be building a frame jig for it later, but for now, the floor will work as a rough Baseline.
All 4 measuring points won't level up at once, I can get 2 to level up to the B-line, but not the other two. I can level up the front leafspring hole and the front bumper mounting hole, but then the rear leafspring hole and steeringbox/idler-arm holes are way off, as much as ca 1" at the rear.
If I level up both rear and front leafspring holes, then the rest of the car seems to point up in the sky, the rocker panels leaps upwards in the front, and the entire front-end is way off the B-line.
Sometimes in the '80s the entire frontend of the car, forward off the firewall was replaced with brand new sheetmetal, and it was done in an Autorobot according to documents included with the car. The car was never driven with after the repair, and I bought it from the original owner a couple of years ago in a disassembled state (it still is, awaiting new metal).
I have looked for signs of collision damage, and have found that the LH rear framerail have been pushed up and inwards. There are no other signs of damages, except the LH rocker panel which have followed along the raildamage. I know the rear portion of the rear framerails can sag over the years (also have a '65 HT and had a '66 HT), but it doesn't look like this one is sagging that much.
Is it normal for these cars to have been tweaked that much over the years, or have something else happened here? I cannot see why that left rear damage would tweak the entire car so much that it wont line up to the B-line on the opposite side?
Should I just leave the car the way it is (except for the LH rail), or should I correct the dimensions to it's original measurements?
And another question; If I ever get the car lined up to the original dimensions, should the rocker panels/floor lip be parallelle to the Baseline?
1965 Mustang HT / 306cid/5.0 roller / T5 / 3.80