Well, I got the carbs running pretty well. Idle set, and I set the timing. The car definitly runs better than before, but I still get hesitation. I was going to start to check my valve clearances, and balance the carbs, when I noticed that there weren't any vacuum lines going to the distributor! (I should have noticed this before, huh?)
I think I may also have a problem with the vacuum advance diaphram on the distributor. I hooked up a vacuum gauge, and its not holding anything....so I assume that the diaphram is worn. Can I just replace the diaphram? Also, there are 2 vacuum inlets (outlets??) on the diaphram.....and I don't know where the the vacuum hoses go because there weren't any attached before. Does anyone know where I can find a good vacuum diagram for this '71 250?

I guess my main question is: if the vacuum advance doesn't work, would this be a main cause for hesitation? My guess is yes, but I'm not sure.

Also, the car seems to run worse as it warms up. Is this because I'm losing oil pressure as viscosity decreases? It misfires more frequently after about 5 minites of idling.

Thanks again!