[elhigh]

Those older rides are usually grandfathered out of emissions testing. I can imagine some nanny state looking over your shoulder but I don't realistically expect it, not with a '55.

The O2 sensor won't help his car but it could go a long way to helping with the tuning, hooked up to an AFR gauge on the dash or even just a handheld.

I wonder what it would take to retrofit an on-the-fly mix control like in light planes? They have to be adjustable while running to compensate for air density changes as the plane gains altitude. I know we have some light plane pilots on this forum, anyone want to weigh in on that idea?

My truck has a carb. Leaning it out for highway cruising would be pretty sweet.