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Fuel system is clean, two filters and an electric pump with good pressure. It's an updraft carburetor so options and availability are not good. I checked into converting into a downdraft system but can't happen with stock components, my block is a 24" block and not compatible with newer than 33
Sometimes adjusting the timing will make a difference. Might be worth a try. Good luck!
"It's delightful, it's delovely, it's DeSoto"
I've made many timing adjustments and point adjustments. My two center plugs get black sooty and wet and my front two are sooty. My rear two are brown. I don't think the fuel is atomizing well and causing this and possibly the hesitation. I don't have a spare updraft carburetor.
I finally got a spare carb. It may not be useable since i cant get a piece of rust out of one of the fuel tubes but there are alot of usable parts in it. The main reason I bought this one is it has the updated adjustable main jet. I also have a Delco Remy distributor on the way. Parts are way more available for them. A new timing chain has also been ordered from meyers dodge. I can't find new gears so i hope the chain will tighten it up enough.
Today i recieved my new timing chain from Meyers Early Dodge and a new fuel level sender from Roberts. Over the weekend i recieved my used Delco Remy distributor 632l and its in beautiful condition. Pics coming soon.
Hopefully this will resolve your acceleration stuttering.
Both carbs are disassembled and painted. Trueing up the surface.
Distributor is cleaned up and working as should, sanding for paint.
I'm doing a lot of this type of work on the last components of a motor rebuild for my '66 Fury right now. It's always very satisfying to transform the old parts into like-new pieces!
Ok, i believe i have found my stumble on acceleration. Look at my pictures it is my old carb with the new carbs adjustable main jet.
In my ebay foynd carb i saw a piece of brass dowel that extends through the top of the carb. When i installed it on my carb i noticed that the arm for the accelerator pump also pushes this dowel up and down which controls the economizer valve. Which runs the carb leaner on cruising speeds.
I agree, that looks like you have likely found the cause of your stumble!
At it again, last night i installed a new timing chain. Finally found one that was correct. Meyers early dodge had one but no gears are available, i put on the new chain and its nice and tight. The old one had .375 of deflection so now my timing should be more consistent.
