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.

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