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Hi Rumble, I guess I should of been clear on the intent of what type of motor. More of a street driver, less than 500 lift cam. 3.23 to 3.91 gear 9.1 to 10.5 to1 compression. I have also have had alot of TQ's and have liked them, but i remember an AVS I had on a factory 68 Coronet 500 with a...

for tunability, performance, and daily street driver. Who wins?

I have seen them broken, to where they would make connection every now and then. When the 2 pieces touch each other going around a corner, or under torque. But your right, most of the time they won't work at all. It is something easy to check tho.

Is your ground strap on your fuel line broken, Maybe making connection once and awhile? I know with the vent tube clogged, it made my car run lean, running out of gas.

Is there any other websites out there, that help with tuning these carbs.

Well since I cleared the vent tube my gas filter is filling properly. I also tryed taking the gas cap off at first and that started the ball rolling. Now the filter stays full at idle. Thanks for the help guys, T.J.

My 72 duster has a single 1/4 line that 2 pieces under the passenger seat and it is suppose to go into charcoal canister next to radiator.

No vent on the filler tube in 72. It does start and run it just leans out and eventually will stall idling.

Well this vent line is a 2 piece. I disconnected at about under the passenger seat, where the rubber line connected the 2 and it was clogged all the way to the front. I will give it a try over the weekend with the gas cap off and see how it works. It's funny to here I had a friend stop in and...

Yes I have a 1/4 line? coming from the front of the car into the top of the tank. I believe it did go into the charcoal cannister that I currently do not have. The line is just open at about where the fuel line ends, below the passenger side manifold. No cali. emmisions, just the one return...

Well, I removed the sending unit. All was ok, blew air thru. It was fine. Blew air thru the fuel line, all ok. set vacumn pump on line drawed gas up to fuel pump. still not the greatest. fuel filter barely fills up. I believe the return line is plugged. I am going to look at that next. There is...

I knew someone with great knowledge would check in.

I heard over the weekend that all 71 Dusters came with the 4 vacumn lines. My brother said his 71 340 duster had them, and that is how he told the difference between a 70 and a 71 model duster. ????? So maybe the 71 demon's were the same . I don't know for sure tho.

Hi Warwagons, I thought the same thing, When I talked to the guy at Vans, He put one together at his shop, same gas tank same sending unit. He said it should be pointing up at the 12:00 position, and a little towards the 11:00. I checked mine after that and it is in the same position. Puzzling...

I will give that a try, hopefully tomorrow. Thanks agaain

I talked to Van's yesterday. It is there new fuel tank and new sending unit. They had no answers for me. I checked the line again today, and there are no bends in it. The rubber line connecting the fuel tank to the line is brand new as is the 3/8 fuel line going to the front of the car. I can...

This is a good topic. My 72 Duster has one return line going into the top of the gas tank and it goes all the way up to the motor, Where I believe it is suppose to tie into the charcoal cannister. no lines going to the gas fill tube at all. This is originally a 340 car. My dilehma is my new 3/8...

I believe the carb is alright, It ran well with the 2 gallon tank on the fender. I can see the fuel filter, just is not filling like it did with the line stuck in the 2 gallon tank. looks like i am going to have to pull the tank and sending unit. HaaHHHHH.

well I took a second look at the sending unit. I have the return line coming into the top of the tank and the gas line going into the sending unit, and then there is another line on the sending unit that has a cap on it. Is this for some kind of return line as well.? It has a plug on it right...

Yeah, I had a 8 ft. 3/8 line from fuel pump directly to the 2 gallon gas tank. No kinks in line. it is a brand new fine line piece. sounds like the sending unit. HuH? the return line being plugged won't cause any problem, will it?

I am looking for help. I have a new gas tank and a new sending unit and a new 3/8 fuel line. The only thing that is not new is the return line. The car ran when I had it hooked to a 2 gallon gas tank. Then I tryed to connect to the factory tank and nothing. I shot compressed air into tank and...

Hi Paul, You are right, My intake is date-coded 7/72 and it has the 73 choke, like you see above. I don't believe it is the right intake on my car. The car was made in 7/72, but the motors are usually always made earlier, Right? thanks for thr good info. I am looking for a good 73 choke for...

I have a 72 intake manifold and a 72 year date Thermoquad. I am looking for the correct factory choke. I have pix of 2. Is the one on the left the correct piece? I am missing the rod, looking to buy one or the whole choke. The one on the right is a Holley and puts it to close to the carb to...