Thanks for the update, I did figure out what it was - 14MM x 1.5 pitch, a drain plug is exactly that same size, managed to find one at my local Ace hardware. I was going to post a pic of that & my trans mount i just finished up fabrication last night - I'll get that up soon & I'm going to do the micro switch reverse solution, its actually a pretty clean way to solve the problem.

Way to go Levey for the idea!!!