Smoke from tailpipe

[mustangdon2k]

I just got the distributor & coil replaced on my '66 coupe (6 cyl - 200 CID). My wife was following behind & noted some smoke coming out of the tailpipe after I accelerated from stoplights. She says it was black in color & was only momentary. It doesn't smoke at all otherwise, such as during idle or going down the road. Only when taking off from a complete stop. Any ideas? The car has pretty much been sitting for a while. This was the first time I've taken it out of the drive since Feb., when I bought it. I don't know for sure how long it had been sitting before that. Any help is appreciated. The car has to have an emissions inspection before being licensed, & they won't inspect ii if the car is smoking. I sure hate to appear stupid, but I don't want to waste time chasing my tail. Thanks in advance for any & all help.