The furthest I've drove the car.....

Hesitation when you try to drive off normally from a stop? If so, you probably need to make a squirter adjustment to the center carb...the only one that has squirters in it. Make sure it squirts gas into the barrels as soon as you tip the throttle and make sure it's a good solid squirt from both sides. If it's not doing that, you found your problem. If it's squirting good, try bumping your timing up a little and see if that helps. Most set the timing up by the book and well, 'book' timing usually sucks...and it you could possibly have the timing too retarded and a squirter problem.