I grabbed the code off of the carb and it's 7028276 which tells me it is a proper Rochester 1968 49 state emissions Pontiac with an auto transmission carb.
That being said I started looking at other pictures of the throttel control arm and it would appear that mine looks just like the others that are for sale? For example this one which is advertised for a GTO http://cgi.ebay.com/ebaymotors/1967-70-P...sQ5fAccessories
Perhaps I was looking for the wrong thing though?
I greatly appreciate your offer on the B&M unit. I would like to go with your original recommendation though. I apprecaite you pointing me in the direction of the wiring harness too!
Now I just need to identify this bracket which actual causes the switch to activate the downshift.