I believe the "Charger" on the air cleaner is legit - Plymouth used "Commando" but Dodge used "Charger" on performance engines in that era.
Year code for '65 was A, IIRC, making '66 a B year; no idea on the engine code, anything stamped at RF top of block near the deck ?
IIRC, a 235-HP 273 used a resonator with a big rectangular exhaust tip, and had solid lifters. Don't know if the standard 273 also had solids.