Well, I have my A500/42rh swap up and running. Like the switches and the location is right where my hand lands if I lay my hand down on the console.
Overdrive is working great, cruising at 3000 rpm, flip the switch and rpm drops to like 2100. Love it, but not having so much luck with the converter lockup. The first time I tried it I swear I felt it and got a small drop I'm rpm, but it has not worked since so I'll have to figure out what's going on there.
But love the O/D.