I lost mine, couldn't justify paying $300 for a 25 year old shift cable so I ended up just making a B&M cable work. It took a little time but wasn't all that difficult and cost $100 in parts...and if the cable itself ever snaps it's only $65 to replace.
You have to buy their shift cable PN 80605 and their 4l60e lever kit.
I drilled a hole in the shifter bracket, ran the cable through it and bolted the tab of the cable to the bracket using spacer to get the cable end to sit where it needed to on the shift lever pin.
For the trans side, just bolt the 4l60e lever up on the trans. You may be able to use their bracket for the trans pan, but I bent my own up for a better angle to reduce stress on the cable. Since the cable is adjustable, the dimensions of the bracket aren't too critical. It just needs to be a 1/8th steel bracket bent in an L shape and then you drill two holes for the trans pan bolts and one for the shift cable to bolt through.
Thanks. I'll try the B&M cable & Bracket kit. The original cable has been "massaged" to where it works, but rough and stiff going from 3 -2 -1 or up. It's not suitable for auto cross or the strip the way it is now.
Thanks for your experienced advice , it's always appreciated !
I ordered the cable and modification kit from Summit Racing. Parts received the next day. After shift cable install, it's off to the Dyno for a transmission tuning.
Car has yet to meet the track since rebuild. Numerous Optispark and transmission issues. Distributer issues resolved with my original Opti, ( with original 250k miles on it), rebuilt with the last GM parts I could find on the net. . The current transmission seems to be holding together, so I hope to get it on the track soon!