The adapter is a C6 adapter but if there is more than one type of C6 adapter I am not sure, but it is pretty long. I will have some pics a little later and I can measure the length if that will help you. Thanks
Yes, that's the one. Here is a pic of the GV I have. Sorry for the poor qaulity but my daughter dropped out camera so a phone pic is all I have. For those that are not familiar with GV's the long tapered part is the adapter and the rest is the actual overdrive itself.
I have a mustang here at the shop we're building, and we are putting a 460 in the car with a C6 trans. I think this would be perfect from what it sounds like.