Yes.
From 1970 to 08/73 40's had a cable controlling the throttle...
Get yourself a pedal from one of those....should be able to find one out here, and then get a cable kit, and you will be good to go!
FYI- The pedals sold in the conversion kits are the same thing as stock...from what I have been able to tell....
Been lookin' while we have been at this, and I cannot find one here...I thought I had one...and a cable!
The lokar set ups that I have used are for the Ram Jet...different set up than your carb.