The carb end broke off the cable on my Challenger. The one I got from Mancini is a little long and doesn't have the same type of fitting for the firewall.

I made a temorary fix by crimping a ring terminal connector onto the cable. I will probably ruin the firewall plug while removing the original cable so I want to make sure I have a good one ready to go in. Thanks

look in the tech section. they are still available from regular auto parts stores

Do you mean dealers? No regular parts stores around here have anything.

go here
http://chucker54.stores.yahoo.net/throttlecables2.html

Check out Imperial Services. They're a bit pricey, but they make a very nice product.