[Oldsguy]

Ray, does the carb bracket on the back corner of the carb have a square opening? If so, that is the standard setup for the Quadrajets on Oldsmobiles (heck, probably all GMs), I don't think you should have trouble finding one of those from a speed catalogue or someone that sells carburetors/parts/accessories for GM. It would be difficult to fabricate a cable because that square is designed to "lock in" the end of the cable housing at the carburetor end, the housing for the cable has a square boss that fits into that opening. Another option would be to buy a new cable with a bracket to match it, lots of aftermarket throttle cables use a round threaded ferrule on the end of the cable housing that a lockdown nut screws into and it fits into a round hole on the bracket. All you would have to do is measure the length from the firewall hole to the bracket by using a flexible tape or piece or cord, and knowing the legth of the cable from the firewall hole to the foot pedal and have the correct termination on that end to fit the pedal. I hope this is some help.