Itolyouso, clever base on the shock mount to frame.
Is that a solid piece threaded for the bolts?

Looks a darned sight easier than welding on/in the two little threaded bungs.

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What is the diameter of the headlight bar you're using?
I built a 3/4" tubing piece for the 32, but will probably use solid for the 31.

A headlight bar is the next project after I get the 3.25, Auburn locker for the 9" set up and the 4.57 Detroit Locker pulled.
'Course, like all nifty projects I gotta finish the pinion wrench today - life keeps getting in the way - and hope my mailorder torque wrench gets here in a few days.

Geez, did you ever try to knurl DOM tubing?
Kinda tough on the surface....