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Can I just use a 440 crank and clearance the cylinder wall sides? ...and do I need special bearings or valve train parts?

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You would need..........

a 440/413/426wedge crank to cut down the main bearing journals and the crankshaft counterwieghts.

Then it will take 383/400 mainbearings.

No special valvetrain until you get fancy and start decking/squaring the block, milling heads or running a solid tappet cam.

Just my opinion, but that Charger is getting into a hefty range. There's no way I'd run a single-plane with a 383 unless you were really going to gear it up (like 4.10 or more)

Go dual-plane, 650-700 carb, headers, a cam with 224-228 duration at .050, and as loose of a converter that you can afford. As mentioned piston choice is very poor, so some closed chamber heads and some block decking is a good idea. Then cast replacement pistons could be a hassle if no valve reliefs.

Muscle Motors sells a stroker kit. Pick your heads, check the cc's, make a phone call.........done.