42RH / A-500 in a Duster with pictures.

That 3/16" might be a better way to go actually. I have both that and 1/8" in sheet form in my shop. jrlegacy23 , are you planning on just eliminating the inner 2 bolts for the crossmember, or moving them outward and relocating them. They definitely need to be chopped out of there to get the trans to fit since it is quite wide. Heres what somebody else did in pix below, which I will probably copy.

I plan on the same, those are some nice pics for reference. I figure that if the factory wanted 4 bolts, so do I. I did eliminate the inner 2 bolts, but the passengers side looks like it has enough clearance to weld the stock one back in and use it without issue