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:
Tower Top Plate, Mustang II
Product Details
Brand: Welder Series
MPN: 14321
Country/Region of Manufacture: Made in Canada
Thickness: 3/16"
Hole size: 3-1/4"
For Mustang II, 6-5/8" along straight edge x 5-¾". The slots are 9/16" x 1-¾". The hole is 3-¼" dia.
