[Livrat]

Now on to the mounting brackets.. Yes they are different between 1/2 and 3/4 ton!!..

The first picture is of the 3/4 ton Delco Moraine booster... the mounting studs are approx 3- 3/4 inches apart...

The second picture is of the 1/2 ton Bendix booster.. the mounting stud are approx 3 1/2 inches apart...
The third pic is of the 1/2 ton Bendix booster with the correct brackets..

The fourth pic is of the 1/2 ton Bendix booster with the 3/4 ton Delco Moraine brackets..

You can see they don't quite fit.. but I suppose if one is "creative" and with a "round" file you may be able to line things up..