I am attempting to tune a 38dges weber on my 1725 engine. The carb has 45 idle jets, 185 air corrector jets, and the main jets are unmarked but have an orifice size of .052-.053". Right now the car will start, but won't idle. I don't have a working tach but I would guess that the engine dies below about 1200-1400 rpm. Backing out the idle adjusting screw seems to slightly lowest speed the engine will run at. However, even with the screws out 4 turns, the engine still won't idle. I plan to buy 50 and 55 and maybe 60 idle jets and try those. my questions are: Any suggestions on air corrector jet sizes? And how do I remove the emulsion tubes? I am not sure how they effect tuning, but I see that there are various sizes available. Any suggestions on main jet size? I am not too concerned with them now, but since I have to order the parts, it might be a good idea to get them at the same time.