This is the only kit worth buying for the TH-400. Only issue I had was putting together to take back apart to cut the cable housing. I cheated and used a pipe cutter on the stainless braided housing and it actually cut through it, but did take some time. Aside from that setup works great. I used this on a 1967 Impala with factory TH-400 that had switch mounted on Quadrajet carb, but would not clear Holley. I had to get the Lokar return spring bracket, that needed a hint of modification to clear hard throttle linkage. Very happy with item, looks great.