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My 340 with 3:23 gears get close to that average, better if I keep my foot out of it, sometimes up to 19.

Nothing wrong with the stock 3:23 gears

The Dodge Coronet 8 3/4 is only 1" longer than the A-body 8 3/4.

So, safe to say, 7% GY3 '71 Dusters = about 300 4-speeds 435 automatics

That looks like Lemon Twist

Did you follow the instructions when you converted to the IVR? The limiter was originally mechanically built into the fuel gauge. The reostat needs to be disabled [ie, bent out of the way of the circuit.

Bought it new 4/71

You mean "limiter". All the gauges run on 6volts from the limiter. Each gauge has a separate sender. If your fuel gauge works [somewhat] that sender [in tank] needs adjusting. The aftermarket temp senders are all bad. The ohmage is always too high, thus your gauge never receives much voltage...

Sounds like a bad sender. Your gauge is getting full 6 volts. It usually goes the other way, ie. never reaches temp on the gauge. Hope you didn't burn out your gauge.

Where did you find a NOS temp sender. I have tried over a dozen aftermarket of various brands. All read high ohmage when engine fully warm and gauge reads barely 1/4. Set up a fixture to substantiate.

Hs anyone found a temp sensor that reads correctly at 180 degrees? That sender should be around 25 ohms to get the gauge to read at half.

OK. Here are some pics

Is the Air Gap a better choice? Or . . . another waste, considering I have the LD-340 intake

Yes, guys; my 340 is mostly stock. Bored .30 with new pistons and rods 25 years ago [maybe 5,00 miles :-) ] Car has 52k miles on it

I am the original owner of a 71 340 Duster, 4-speed. The car is street driven with just over 50k miles. Currently, I have a Edelbrock LD340 manifold with a Quick Fuel carb. What do you think the benefits of replacing the LD340 with a Performer RPM. I am quite sure I'd have to find a bit lower...

Long ago I converted my 340 Duster to electronic ignition. The box was blue and has 5 posts. The box started to drip "goo" so I ordered a new Mopar chrome unit. It has just 4 posts. Is there a difference?

Its a brand new carb [quick fuel] my carter TQ did the same thing. Fuel pressure gauge reads OK. New 8mm wires, too. I am going to carefully inspect the distributor cap and rotor and switch out the control box. Is there any reason not to use the chrome box?

why do you say that chrome box is just for hi rev motor and orange box is junk?

I have seen gas squirt from accelerator pedal, but still hard to start. I have considered gas evaporating. However, I do notice a distinct hesitation . . . even afre the car is warmed up . . . upon getting the car moving. I was wondering if there might be a connection.

I am the original owner of a 71 340 Duster. It is showroom. 52k miles. Recently, I have noticed a starting problem, only after the car has been sitting for a week or more. I have a hi-torq starter that turns the motor well. I checked that the carb [new Quick Fuel, but my Carter TQ 9800 did the...