My 440 ran 12.6's in a GTX with 3.23 gears and has the same plugs in it I installed 10 years ago.
Your doing something wrong.
That I definately agree to. The combo was selected by the previous owner, when I tore it down I put a comp cams 268 XE cam and had the carbs gone thru, but the rest of the engine has stock 452 heads, low compression 8.X to 1 pistons, and other unremarkable parts. I upgraded the cam and stall to some better matched components, but the car never has ran worth anything.
