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I have over 100 thermoquad and tons of spare parts. PM for any questions but Bewy pretty much cover it!

I use on the race car a PV that is at least 2 inch VC under my idle reading on the gauge.

You will be fine = Just take your time and do not lose anything!

No reason for 1/2 line anywhere in a street car. Even our 10 second Race cars are happy with a 3/8 line.

Do not expect a big change = the spacers make a small difference in performance.

I have never seen Phenolic leak myself unless they have been cracked or damaged in some way.

Often they leak down from the two small O rings. Also there are small pieces on bottom side on Phenolic that I epoxy on to prevent leaks. These are what I would look at first if the carb runs fine. I have not seen them siphon thru Accel pump or discharge nozzles in my experience.

Perhaps try one more full turn on the Air Valve.

Try tightening Air door. Bend accelerator rod to adjust timing of squirt.

On our race cars, a loose throttle shaft does not seem to make any performance difference unless it is so loose it binds up. Probably gives you a few more CFM (Joke?). Now on a streetcar where it has to run in different throttle/vacuum positions, it could possible cause a tuning/drivability...

Beware of generic TQ rebuilders. They crossbred parts often. There are at least 9 different Phenolics that I recall and only the matched one from the factory will give optimal performance

If needed it is Easy to drill another hole in each Carb if necessary = Use a gasket for a template. Ram can be drilled if there is enough metal. Post the numbers and we can help more! Not a fan of the Offy Ram adapters.

They look to me like a bolt on. Does not matter if the Manifold holes are bigger than carbs. 383 Roaderunner had a mamifold hole much bigger than primary on carb. The Carter AFBs were made for almost forever and are a great cab and easy to get parts for still! Try to find or make a progressive...

The 71 340 carbs were recalled for Drivability issues and many were replaced with 72 carbs back then. Yes I am very old! Well, my Balls are the only things that seen to get bigger with age!

It would be a good idea to check you oil for gas contamination.

Engine displacement is on a smooth pad on front of block as well as VIN. Casting number is on the side of the block in a raised area but may be had to see.

We never use it inside the shop = Rusts everything! We only use it behind the shop. Do not ask why it is our Stock eliminator heads LOL!

I do not understand the reasons for this either. It might be worth checking some additional sites to see if it is the same on them!

A lot of interesting articles on this entire website! I learned a lot.

I recommend a good quality/size external filter if your budget allows

Very Simple carb to replace needles and seats and set floats. That would be my vote.

I agree the Knock Offs out of the box are no match for a real Air Gap!

With a Edelbrock Air Gap about 15 HP+ at 6000 on a well prepared 550 HP 360 that was in our 10 Sec Valiant.

Correct on the manifold. Mopar also told NHRA that the Lil Red Express trucks came with the W2 Heads and conversion came with the trucks to be dealer installed. This allowed the W2 stuff to be used in class that required a production available and produced Head.

I never tried that.

They are a weird looking jet/plug under carb in intake. I plug them for racing. Beware they are an unusual thread that I can never find anywhere so I tap them to a regular plug that I can find. I do not suggest tapping then with the manifold still on heads.

If you watch our Video from last week at the World Final in Racer Section = You will see a 71 on our Demon.

I run 12 gallons on my street/strip cars. But they are Weekend only cars

Idle Air Bleed are pointed outward om 71's All the later 72 up are pointed straight forward. You can see that 5 ft. away at the Swap Meet!

I have been racing with these Carbs nationally competitively for 50 years. In both Dyno Testing and on the track with properly well prepared 71 and 72 (and up) carbs. The 71's are 10 to 15HP more power on a properly prepared Stock or Superstock 340. This translates to sometimes as much as 1...