[Masonite]

So coming home from the meet yesterday, I noticed a slight hesitation when giving it gas at low RPMs. Once it got past 1500, the car revved fine. Throughout the night, the problem seemed to worsen--it eventually got to the point that it felt like I was losing torque at random points in the RPMs, almost like it would pull, hesitate, then repeat. Almost like a subtle bucking feeling. I THINK it's my carburetor, but I'm not totally sure. Any ideas/suggestions would be fantastic. Please keep acronyms down to a minimum--I'm a bit of a noob when it comes to auto repair. Oh, and this morning, the car would crank but wouldn't start until I pumped the gas a couple times (usually takes only one pump prior to starting).

Anyway, the reason I'm posting this in the lounge is because if it's an issue with the carb, I'm in luck. I just found a Holley 750 double-pump carb in my garage (I think these are illegal on the road!) that MIGHT work. Sweet.