Are the 340 carbs different than the 440 ? And other than maybe jetting what is the different?
Carbs
- Thread starter Big bill
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What type carb do you speak of Big Bill?
Holly two barrel on a six pack set up .
70sixpkrt
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Different jetting and venturi sizes.
fastmark
Well-Known Member
Venturi sizes are the same between 340 and 440. Metering plates holes are different and air bleeds may be. I have not checked that. The hole in the outboard throttle plates is different. A 340 is #199 and .055”. A 440 is #226 and .079”. A 199E plate is also .079. The only center carb that is different is a 69.5 440 4391 manual trans. It has a 225 plate with .079 hole.
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