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...the rear trailing arm on 1076 had a kink, and I didn't have the courage to bid over the $650 the NOS one sold on Ebay a couple months ago...so first time for me, here are the steps to make one. First step, with the good trailing arm, make a jig. Good thing these things are flat.

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..bought a cheap tubing notcher...and those things are cheap--check the youtubes for them, you will need to ship both sides to get an even cut. Also, the 70' angle is steeper than those tubing notchers will cut, so I worked past 60' and then went thru a lot of time grinding.
Tubing was all Chromeoly; original is all 0.090" wall tubing except the tubing for the upright rod (which was 0.120). Yoke and upright links are 1 1/4" tubing, 1.0" tubing on the arms, and 5/8" tubing on the rear link. Being unsure at this (and preferring some weight to the worry that my car would be, um, 'let down' by a failure, I went with 0.120" wall for everything.
To avoid alignment worries on the upright rod, I kept the tubing solid there on the back (and trimmed it back when welded).

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