I'm not putting a feather in my hat, but I'm giving you a measuring stick. My first time out with my '76 Duster (not a factory 360) a couple of weeks ago, I just ran a 14.29 with 2.45 open rear end, stock converter, stock exhaust manifolds, in an almost complete stock 360 (just added a 4bbl and a .427 lift 204*@50 cam). My cam is barely over a 360 2bbl cam. I plan to go high 13's by only messing with the carb, as it is very lean right now. I'm going to put another carb on that will perform better, and I hope to go 13.99 :D