Yours looks to have different period builds? If older pro stock type build? Say mid 70s? That rear setup looks newer than what was available in 70s? So does the front's rack & pinion. My E-body has a 1975 Mustang rack in a Pro Stock attempt back in the day. (Though couldn't compete with the Landy's and Sox Martin's of the day.) And it doesn't look like the aftermarket setup of your Duster.
You have an interesting piece. And very nice car.
Here is what me and some old race car guys have surmised about the car as I have run into dead ends trying to find any history.
Looks like the 2x3 frame was done and the cage at the same time. The rack in the car is a 71-72 Ford Pinto part. The lowers control arms are also Pinto, but the upper control arms looked to be Mustang II putting the build after 74. However, the mounting points were modified at some point so the uppers may have been Pinto also when first built.
The rear end was a leaf spring setup with front mounts boxed in the frame and sleeves in the rear rails for the rear of the spring. It had a panhard bar mounted above on the rail with a mount on the right tube of the diff. Five welded attachment points in the front left and four on the right. Looks like wheelie bars were inboard of the springs. Slider ? or ladder bars at this time??? Looked like a chain was welded to the Dana on the right and left sides from the cut off part still attached. Why???? chute???
When I got it it was angled coil overs and the 5 inch long X 9/16 heim joints locating the rear from the old panhard bar mount to the rear end cover. I believe this was when someone was attempting to convert it to a street car.
Brake master is moved about 7/8" outboard on the firewall, why???
The floor was removed from cage mounts back and replaced with sheet metal as were the tubs. Tubs are HUGE as I can fit a 16" x 33" Goodyears under there no problem.
Firewall cut up in places and then just covered with a sheet of .080 metal.
The whole front core and fender supports are made of 3/4" square tubing and held on the frame by two quick disconnect pins. Front bumper held on by a flat sheet-metal bracket.
So there it is.
I am going to replace the dash with a fiberglass one and add a aluminum steering column when I cut out the floor and firewall. Moving the firewall back 4" and the motor. The rest of the frame and car will stay as is.
The drive train will be a 426/ magnesium tunnel ram/ dominators and a CS1 lenco. Hunting a Lenco now.
