[Mark Yacavone]

The wagon in question will weigh about 4200 pounds.
That's way, way over capacity for Vega box.
The Time Bomb Vega box is smaller, only 2 bolts will line up, the Pitman arm has a much smaller spline, and the rag joint coupler is under the standard GM size too.
Years ago, I started to put one on my 78 400 Firebird, but then decided it was too shaky of a deal, just by looking at it.
I've seen plenty of 3rd Gen. SBC Camaros with them, and to me , that's about the limit.
These wagons should have a standard size GM car, or an S-10 box manual box.
It's almost a direct bolt in, except for the Pitman arm, which is the subject for another thread.