When we ran a full service chassis fab/turn-key hot rod shop a number of years ago, it was always useful to have threaded things around to weld into the frame for some kind of mount, etc.
Here’s a list of all our threaded things for your reference:
Formed Transmission Saddle Plate
Product Details
Brand: Welder Series
MPN: 40002
Country/Region of Manufacture: Canada
Thickness: 3/16"
Hole size: 3/8" holes, 7/16" slots
Used with two flanges to mount a T400 (or any other GM transmission) on a 1-½" to 1-¾" tube.
Slots are 1-½” long on 1-½” centers to take a GM insulator. Overall dimensions 8-¼” x 5-¾” wide. 3/16″ pickled & oiled mild steel.
