Head Gasket

I have a 65' dart 270 with an original 273, Carter BBD 2 barrel and true dual exhaust. I've had an issue with using oil, I have to add half a quart every tank or so, and I've added a little coolant once. it doesn't ever smoke that I can see, but when I start it up, the left pipe blows out a lot of moisture and soot until it gets hot, it will have a big puddle with black spots in it. the right side barely puts anything out. does this sound like a head gasket? there is no evidence of coolant in oil or oil in the coolant, and the plugs look pretty good, with slightly sooty base rings.
When i first bought the car, I replaced the intake manifold because it was weeping a little bit on the left side, i thought that may have been where i was losing oil. however, it didn't slow the loss.
the other symptoms I have are long long cranking before startup if it has sat for a few days, and a little popping on deceleration when it's hot.
I haven't had a chance to run a compression test yet.

1. Head gaskets are last, since that is probably not one of your problems.
2. I also bet your heat riser is stuck shut. I also cut them out and seal the pivot holes by tapping and plugging with stainless bolts.
3. Try an oil change of 20-50 VR1 Valvoline racing oil with a good oil filter. Change both every 3,000 miles.
4. Did you use good intake gaskets or did you use those worthless stamped steel ones?
5. Your choke has to be shut when cold, open slightly as soon as it starts, and be full open by normal operating temperature.
6. Do you have a points ignition and where is your timing set?