you can rig something up so that the cable pulls tight only at full stroke of your accelerator arm. I did this once before kind of homemade style but it worked pretty good. Also summit racing has all kinds of parts for your carb. part # HLY-20-45 is a kickdown bracket set that links to the cable on your th350 and its less than 12 bucks. part HLY-20-40 is the kickdown stud that mates the two for about 7 bucks. good luck, and I like your 51!