You have a very valuable Coronet 440, I would leave it alone! most guys then would buy a Roadrunner or superbee . I know, because I rode in them back then when new, and I am really Old! Also, the Insurance was cheaper on a coronet VS the BEE or Runner. in1968 and 69 dodge and Plymouth used the H code in the VIN for both the 330 HP and the 335 HP 383 engine. The Coronet non superbee got the 330HP engine. 333hp was reserved for superbee and Roadrunner.
Coronet, Satellite and Charger got the 330 hp. 383.
they shared the 10:0 compression ratio,exhaust manifolds,and Intake manifolds. HP carb on 335HP, and LP carb on 330 HP. The earlier post sheet shows the engine to be 330 HP. In any event you have a valuable car with that correct engine, and Chrysler admitted in disbelief that the lower perfomance cam engine came within 5 HP . In my superbee the 335 came with double row timing chain, windage tray, and the 440 Magum cam,lifters,and springs. Those were not in the 330 HP. It had the same cam as the 383 Two barrel engine.
My superbee 383 was stamped HP on the block, my Satellite 383 is not.
side by side back in the day on the street the driver was the difference between the two, not the engine.