Re: Does frame need to be straightened?
The bottom of the rear frame at the front master gauge hole on the passenger side is 5 5/8" off the ground on the driver's side, and 5 3/4" to 5 7/8" to passenger side (the difference could be human error).
The front of the front subframe is 10 5/8 off the ground on the passenger side, and about that on the driver's side.
The alignment holes seem to be dead on just by eyeballing it and sticking my pinky in there.
It looks like the frame is bent or warped in the front driver's side thus making front gauge hole not a reliable (is it datum?) point. So I went by one of the other holes in the side of the frame, and just hung a string from the edge of that hole. Those were the front of the subframe data points, or point "F".
The rear subframe, or the middle of the car was measured with a bent metal hanger to try to get the middle of the hole as close as possible. That is the middle data point, or point "M"
The rear frame rail was measured in the center of the master gauge hole in the front bottom of frame rail. They is my rear data point, or point "R".
In these measurements, "P" will connote passenger, "D" driver sides.
Measurements are as follows:
RP to MD = 79 5/8
RD to MP = 79 13/16
MP to FD = 50 1/2
MD to FP = 50 5/8
RD to MD = 69 5/8
RP to MP = 69 7/16
MP to MD = 44 3/4
FP to FD = 38 5/16
MP to FD = 28 7/8
MD to FP = 29 1/16
So basically, the lines from the master gauge hole of the rear frame to the opposite center of the master gauge hole outboard of the firewall body mount are 3/16" different. Is that too much?
It appears that the front subframe isn't 100% square - the lines from the master gauge hole to the front of the frame are 1/8" different. Is that OK?
Strangely, the lines from the rear frame master gauge hole to the sub frame master gauge hole out board of the body mount on the same side are about 3/8" different, and the same for the subframe master gauge to the front. Is that a problem?
What about the differences in ride heights?
I tried my best to measure, but it is extremely difficult to get it 100% perfect. These numbers are best estimates, but they look decent.
This was done with the suspension fully loaded, and the car on the ground. Is my frame OK?
Black 1968 Coupe.
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