alternative kickdown linkage?

looks better than the Bouchillon setups I have seen. The "cheaper alternatives" look similar to yours.
I've heard that these aftermarket cable setups wont work on factory Carter 4 barrels? Is that true?
one I'm considering on the 318, is a TQ that I have here. but not on a factory intake.
Don, for the 68 Barracuda I looked at the cheaper eBay kick down cables but decided to go with the actual Lokar cable kit. It was easy to adapt to the GM Vortec TB that I am running and came with the correct adapters for the 904 transmission. Easy to adjust and functions fine.