Unfortunately only after I struggled installing my new carpet did I decide to log on and see what the experts say about it. I bought new carpet for my 68 Coronet 440 (R/T Clone). It has bucket seats, auto, no console. I have it in there and it it nice and tight over the driveshaft hump alongside the seats, but when I bolted the ratchet shifter down to the hump a little forward of the seats I get a big bulge on either side of the hump around that shifter and forward, basically from the front part of the seat to the firewall. Ordered it from these guys

http://www.trimparts.com

through eBay and didn't realize until 5 months later when I finally got it in the car and doing the install that they must have sent me the wrong stuff.

I guess at least I know what the problem must be, the extra carpet bulging up must be for the 4-speed hump (that is not there).