[HO455]

After spending half a day at the u-pull it yard I came home with 4 different brackets. They came off of 83 GMC Caballero (2), a 1995 Van (3), a 79 C10 (4), and a 77 Oldsmobile Cutlass (5).
The photo also shows the one I had installed on the WMB (1) that was incorrect. The brackets are sort of arranged to show the the difference in the detent cable locations. (Blue lines.) The red arrow indicates the bolt hole that the last bolt on the intake manifold would go through. The #5 bracket only bolts to the carburetor back bolts so I was less accurate in placing it.
I initially went with the #5 bracket as I liked the all in one bracket and it was within the range of adjustment for the detent cable. However after I got it cleaned up, painted, and installed I realized that I could only get 90% opening of the secondaries. The angle to the throttle shaft arm was wrong. 90% was much better than before but I real want 100%. So I ended up pulling it off and using the #2 bracket and my original (Original in that it was on the truck when I bought it.) bracket. Now I have full throttle opening and the transmission shifts down nicely.