The Dodge/Chrysler 400 is basically a bored 383. It uses the 440 bore size and the 383 stroke length. If it is the plastic FANTASTIC carb, I understand it had many issue once it had some age on it. Find someone who knows the carb. I never turned a wrench on one of those carbs. I mainly messed with Hilbron constant flow injection on my OLD Early Hemi's. Also some 400 were built with the "Lean Burn" system on them. If it is one of them, you can tell by the electronics in the air filter if you still have the stock air filter housing, your best bet would be to change the entire induction and ignition system to earlier parts to get the engine to run right.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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