Rumblefish, rockauto.com has a listing for a 19 1/2" throttle cable for a 74, 318 2bbl Dart Sport. It runs less than $20 plus shipping. I don't think you will have any cable issues if you swap to a four barrel, (I didn't have cable problems when I put a Torker and a 600 Holley on my 73 318 van) but you will have to lengthen the kickdown rod to the tranny if you have an automatic, it doesn't have enough adjustment to make up the length difference, at least not on a van. I also had to come up with a different throttle return spring. In case you are wondering what sort of idiot would run such a setup, bear in mind that it was 33 years ago, I was 20 years old, and I've learned a little since then. Hope this helps. :thumbup: