Interesting that the car starts out completely OK or almost OK for the first 3 miles or so after sitting overnight. Then when the engine is warmed up after about 5 miles the bumbling and stumbling starts. If it was the fuel distributor, does it make sense that after the car sits over night that it improves itself for the first 3 miles the following day?

I only had time to look at 4 of the plugs on one side of the block. The gap was .022" through .032" (pretty tight) - It does not appear that the Tech put the right gap on it. I widened the gap to about .037" on the four. I hope to look at the other 4 over the weekend. After the 44K fuel additive, really not that much change that I can tell.