...factory carbs on many older cars. Think "4 cylinder Ford Pinto" and you get the idea
"older"? What is '52 rochester model "B"? "oldernhell" perhaps.
By 1972 these Pinto carbs were deep into the emmisions era when reduced engine timing,compression,and excessive leaness required everything from heated air cleaners, 195 degree thermostats, looser factory torque converters to instill any thing near the driveability of the presmog era into this era's vehicles. It was'nt until 1975 when the catalytic converters appeared did we see any appreciable driveability improvements.
Any factory carb is "less tunable" because they were specifically designated for a specific make/model. This is why Hollys enjoy the hotrodder's praise-they are "fit-alls" and have to meet no one's emissions tests, they are a bit primitive and can be resonably tuned or adjusted to suit individual tastes. The same Holly will not perform admirably from Pikes Peak to Death Valley as most factory carbs will on their original mounts.
