Here is a link to a forum thread that has plenty of pictures and even talks about how to make the changes without the programming clip. The information here is similar to what's in the DRAC paper. Many links are dead now but there's still plenty of good information.
http://67-72chevytrucks.com/vboard/s...d.php?t=313815
Possibly. If you Tee the DRAC into the VSS signal it would probably work. But you'd still have to gain access the 2K ECM speed signal wire in the dash to cut it and connect it to your new DRAC.I wonder if it would be possible to wire in a seperate drac module like the PCMs used and calibrate it that way????
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