What was the deal with these 71 340's with thermo quads. I have heard/and read maybe this is the best carb for a 340. When i bought my first Challenger in 1974 it was a 71 340-4speed car. I thought the thermo quad on the car was junk-it did not kick in or run hard. A friend of mine looked at the carb and discovered a piece of the linkage was disconnected. Man waht a difference-that carb kicked in and would burn the rear tires (not a lot but it did spin the tires when the throttle was mashed). The carb was missing alot of the choke pieces and what not-i don't know if someone who knew what they were doing or not had worked on the carb. I have had alot of carbs over the years-and i have never had another 4 barrel carb that kicked in and ran like that carb did. My six packs kicked in real hard, but i don't think they spun the tires like the thermo quad did. My friend bought a new thermo quad, but it did not run like the one i had on my car. Is the 71 340 carb special/specific only to a 71 340 or what. Do they sell an identical carb like the 71-or due you get a diff carb than the original 71. How many cfm's were those 71 340 carb's rated at, didn't they have a 800 cfm rating? Then why do most mopart's posters recommend a 650 Holley dual feed/double pumper over a 750 dual feed/double pumper, when the 71 340 ran so well with a big thermo quad?
Last edited by rtplumcrazy1; 06/28/11 03:34 AM.
