with the emission cars, and carbs, a little fiddling with enriching the carb and advancing/quickening the timing, can really improve the response and general character of the vehicle. Even Monojets when treated to weaker power piston springs, plugging of the adj. part throttle circuit, and enrichment can really become nice carbs.
They are cheap at the swap meets--easier to find one of them without wornout throttle shafts than the old model "B"s so no rebushing is required (and they don't have that wheezing whistle at part throttle operation)
Old timers claim that when the four bbls came out, existing testing equipment could not "suck" hard enough to bring vacuum readings down to required 3.0 vacuum level, so to be able to use existing equipment, they starting using the now common 1.5 vacuum readings as a "standard" (for four bbls), thus the two different standards by which many are fooled/confused. Even some manufacturers stir that pot to their benefit.
