273 Smoking When Cold....???

:munky2: I usually let the wagon warm up for a bit before I put my foot in it a bit, but this morning I had to get in and go.......and what do I see? White/blue smoke out the rear view mirror when I give her some gas off a stop light. After I get stuck in traffic at the metering light for 7 or 8 more minutes trying to get on the highway I notice that it has stopped smoking when I get on it.
I was wondering what the diagnosis might be.......MY uneducated guess is rings that seal up after the engine heats up???????
Whats the fix for the problem and anybody know a GOOD engine shop here in San Diego area ????? Thanks for the help.
The engine runs pretty good, smooth idle I put a new 2 barrel on it when I bought it 4 months ago......tuned up single point distributor .17 gap new platinum plugs .35 Gap and set timing @ 10 degreees before TDC at 800-1000 RPM I'm guessing because of no tach..............but she still only gets around 11 MPG.