What up with my car, Doesn't run well Options

[keith]

Shitfuckdammit. Ran so - so up until Saturday morning before JP's meet.
Here's the car
74 2.0 I would guess around 100k
The car very original - the brake lines (which I replaced) and the shocks (which I have not) had a 1973 date on them. I don't believe the engine or any of the major components have been changed since it left the factory.
Here what I have done:
Replaced all vacuum lines
Plugs, wires, points fuel/air filters, temp sensor II, alt, voltage regulator, battery, cap and rotor and points.
Valve adjustment done about 500 miles ago.
Problem:
Hard to start. Kind of acts like it's got carbs when cold.
After starting it will idle at 700 rpm and threated to die. For the first couple minites you can hold a steady RPM with the throttle, say 1200 to 1800 and higher if you want.
After a couple of minutes it stumbles around this range. You just cant hold a steady RPM below 2000.
Engine will rev freely past this point and while driving seems to run well.
I've read about adusting the dwell then the timing in the manual. Do they even make a dwell meter anymore??
Any ideas welcome. Or free (IMG:style_emoticons/default/beer.gif) and pizza and use of my lift for anyone who can help.

TIA

Keith