Hmm, I'm in the same boat. I also went to a 4bbl from the stock 2bbl, and jerry-rigged the kickdown linkage. It works, but not very pretty, and doesn't have quite enough adjustment. In my case the throttle cable was plenty long enough.

Does anybody know if this kit from Mancini will work on a 318? It sounds like it will work with the stock KD linkage, which is nice.
http://chucker54.stores.yahoo.net/thbrwikdprfo1.html

-Dave