Carb recommendations for my 340

RB340SBM said

Hey everyone,

Looking for a carb recommendation for my 340. Car is a 71 Dart swinger with a 727 that has a shift kit and an old hurst autostick 1. Engine is 10:1 with a 484 purple cam, ported x heads, TTI headers and can’t exactly decide on intake. Currently has an LD340 mounted right now but plenum divider is removed from previous owner and not sure how well the car will be in terms of street manners as it’ll be a street car with occasional trips to the track a few times a year. Worst case I have an air gap on the side. What would you guys recommend? I’m new to carbs so would like to find something that’s good but simple enough for me to learn to tune.

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Oh man you opened up a can of worms! LMAO.

AJ is right on carb size working from little to big. Considering the build, I’ll also assume a decent gear ratio is back there for the go fast effect.

I can only say what I would do and having used a 600 AFB to a 750, I liked the 750 a little better. Even on the lower rpm side of just around town or initial take off, there was a better and more powerful feel from the gas pedal. Of course, everything will be the state of tune.

If you don’t have a preference of intakes, I would use the RPM. I’ve had both intakes, so there’s that behind my choice. Nether is bad and nether is worth getting rid of for the other. Since you have both, try it for yourself and decide.

Some will run the LD-340 because it’s a ”Day 2” hot rod part and others will run the rpm without care or concern of that period correct hot rod part.

So far my favorite combo was the MP tips modified LD-340 and the big TQ.