Thanks but I have had my car there several times. ONE time was embarrassing...
I decided that I would drag race the car. I had not clocked the car with the 440/493 setup yet but was expecting a low 12 ET. I heard that for that time, I'd need a helmet. I bought one along with a 5 gallon drum of 110 octane race gas. I put in new plugs and went to the track. The car was idling great, it seemed to feel fine but when I made my first pass, it coughed, spit and sputtered once I got it past half throttle. I turned a mid 14 at some crappy mph. In the pits, I looked it over but found nothing wrong. No loose plug wires, plenty of fuel pushing through, no vacuum leaks...
The second run was as bad as the first. Anything over 1/2 throttle and the car cut out and sputtered. I was embarrassed. At home I took a deeper look. The plugs were improperly gapped to .045. I thought a wider gap would help make a bigger spark. Also, the air gap in the electronic distributor had slipped from the correct .008 to .020! The wider gaps made almost no difference under light throttle conditions but once the cylinders were packed with air and fuel, the spark was too weak and inconsistent to allow it to run right.
Okay, a mid 14 is not a terrible number but when you are expecting to be 2 seconds faster with a clean pass, it sucks ***.