Dash Lights, Carb, Radiator issues

Get the books in this thread. Tune-up parts and technique suggestions in this thread. Carburetor operation and repair manuals and links to training movies and carb repair/modification threads are posted here for free download. "5-565" is not your carburetor type number, that's a casting number from one of the pieces. No dash lights could easily be a complete collection of burned-out dash bulbs, could also be a faulty rheostat in the headlight switch, and could also indicate that your taillights are faulty (they're on the same fuse to provide a warning to the driver that something's wrong/invisible from the rear). If it's the headlamp switch, the whole switch gets replaced. Market's full of Chinese garbage parts these days; familiarize yourself with Old Car Parts Northwest

Original radiator was a 19" with a wide left bracket unless the car was ordered with heavy-duty cooling or a trailer-tow package or factory A/C or Clean Air Package, then 22". V8 cars got 22" radiators, but the hose fittings aren't located where needed for a Slant motor.

Eventually you'll also want to read this post.