I just bought this car with the intention of swapping a 383 and t56 into the car but until then I want to play around with the 305, problem is it has an odd idle. It will hover around 750 then bump up to 1k and occasionally drop to 500 the bounce back up to 1k, it throws code 34 and doing some reading makes me think it could be a tps. It smells like its running rich and it's a California emissions so that makes me think it could be some type of vaccume leak or map sensor issue. I know a fair amount about cars but I'm no Dom Torretto so any suggestions are appreciated

UPDATE:
I was messing around and unplugged the map and it went smooth, I plug it back in and it goes choppy again, could this be a bad sensor or a bad line somewhere causing the sensor to read crazy ?

 

What is the fuel pressure?

How old are the usual "tune-up" items--Cap, rotor, plug wires, spark plugs, fuel filter, air filter, O2 sensor(s), and check the cranking compression pressure, initial timing, electronic timing advance, EGR function, PCV function, etc?

Connect a scan tool, find out what the computer wants you to know. Codes can be helpful, but the real diagnostic power is in the data stream. Verify EVERY sensor, and computer output.

"Smells rich" very often is a result of misfire; which then wipes-out the catalyst. OTOH, a catalyst that's wiped-out for any reason makes the exhaust stinky.