Yesterday I was in my 71 SWB w/ 460 (1974). I nailed it after at a stop light and at the next one the truck's idle was REALLY rough. The truck was rocking back and forth. The idle was a little high at about 700 rpm but that was it. It did it all the way home. This morning when I started it up. All was right with the world. No problem. So, what am I looking at here. Is this vapor lock up? By the way, the engine is stock 74 low compression, no power, retarded timing, factory carb, leaks oil, SLOW, but I love it.

Austin