HI Folks. Hoping to learn some great things here about my new ride. As the title states I have a 67 ranchero w/ 5.0 HO Engine & 5 spd tremec. It was running a bit rough when I got it and I have been chenging all the main sensors... MAF, TPS, IAC, both 02 Sensors. Its running better but I feel like it still level off a bit on the idle. Also having a hard starting problem in the morning. My MAIN question is this-->> So because this engine is in a 67 ranchero that is registered here in CO as a classic... WHAT CAN I DELETE? For instance I was reading on how to reset the base idle and it had me unplug the IAC and rev the engine and set the throttle at 800 rpm. It seemed to rev and idle better with this unplugged. Can I delete the 02 sensors? Ideally I would love to get a list of electronics I can remove from my engine because it is smog exempt. Is this a good idea and will it make my car run better? Thanks a ton.