I have a '67 400 with a TH400. It has no parts for the Kickdown switch at all. What is the best source for all the parts needed?

I looked and searched and found the LOKAR and the B&M units. Which would I be better off using? Im not to sure how the LOKAR unit connects.n What about a GM unit?

I'm not worried about stock appearence. It currently has an Edlebrock Carb and an OLD edlebrock intake on it.

How do both of these units hook up? Wire harness, direct cable?

Thanks,

Rob