Help me out please! I just swapped in a 350HO and kept the TBI system (upgraded to 670 Holley, custom chip too). It all runs pretty well considering I did it myself, but, I don't have a high idle at start-up, so the engine runs kinda crappy and loads up/runs rich until it goes about a mile or so. I've changed out the coolant temp sensor and the air charge temp sensor in the air cleaner housing, but still no joy. Any one else had this problem? Anyone know what causes or controls the high idle circuit? This is new territory to me.
Also, is the 305 MAP sensor good enough for this engine or do I need to find one for a 350 and, if so, what year/make/model of car or truck would be best?

best regards and aloha from Hawaii
Mike