Reply to "Idle is creeping up"

I'm assuming you already checked around the carb for a vacuum leak. Are you stuck on the fast idle cam? Is your choke open all the way? The choke on your car needs heat from the exhaust cross over passage in the intake manifold to open. Later cars had an "electric assist". There should be a little metal tube connecting to the choke housing. If the choke is fully open and your off the fast idle cam (located next to the choke housing) then I'm guessing maybe something to do with the distributor advance. Try disconnecting (and plugging) both vacuum lines going to the vacuum diaphragm on the distributor and see if the problem goes away.
Too much fuel pressure would most likely cause the idle to go down. Besides, if the fuel pressure was more than the float and inlet needle could handle, you would have gas squirting out the top of the carb through the bowl vents.

Here's a picture showing the adjusting screw for fast idle. The cam has a series of "steps". The screw shouldn't rest on any steps when the engine is warm and the choke is fully open.