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Old 01-20-2019, 03:50 PM   #1
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Join Date: Aug 2012
Location: Central Illinois
Posts: 33
Trailing arm perch spacing.....measurement.

I've searched but haven't found the center line dimension between the trailing arm perches. Planning on swapping a mid '80s rear end into a '64.
I want to go ahead and get the rear end modified for the swap by adding a panhard bar bracket and the trailing arm perches.
The truck is going to be at stock height so pinion angle won't change.
Can anyone provide these measurements:
1) trailing arm perch side to side center line distance
2) original pinion angle

I don't have an original rear end here to measure. That's why I'm requesting help from the forum.
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Old 01-20-2019, 08:28 PM   #2
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Join Date: Oct 2014
Location: brandon, mb
Posts: 110
Re: Trailing arm perch spacing.....measurement.

I just put a square body rear end in my 65 bare frame. It's kind of hard to weld your perches on at the proper pinion angle with the axle out of the truck because the perches don't sit level like with a leaf rear suspension. Sitting on the trailing arms they lay at an angle. What I did was bolt it all together without welding the perches. The rear u bolts at the widest (rearward) are 41 3/4" on center. Get it centered left and right and snug it up slightly with the pinion pointing slightly upward. Then with the full truck weight on the wheels measure and adjust it to the proper angle. Once you get it set tack the perches, then lower the axle and fully weld it.
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Old Yesterday, 01:01 AM   #3
60-66 Nut

Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 21,697
Re: Trailing arm perch spacing.....measurement.

I could get you that info when I get to my shop tomorrow, if someone else doesn't first.
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