electrical gurus, i need help sizing an alternator.

Ok folks,

I am looking at 50 amp compact 1 wire denso type alternators. I can get a nice one new for a good price. What i need to know is if 50 amps will be too small for my application. The stock alternator when it was a strippo slanty was a 25 amp roundback. I know this had to have been marginal when new.

My power requirements.

All my lighting will be LED, except headlamps. They will be H4 halogens with relay circuits.

Car originally was radio delete, and now will have a small hidden audio setup that uses my phone as the head unit. Its 25 w rms x 4 channels. No external amp.

No A/C .

stock V speed windshield wiper setup restored.

stock restored 3 speed heater blower.

Probably will end up with an electric engine fan setup if i cannot find a good clutch fan and shroud.

The engine harness is a repop from year one, alt output wire is already an 8 gage lead. Everythings been modded to remove amp gauge from the circuit, and route alternator output wire directly to starter relay terminal with a fusible link in the circuit.

Thanks in advance
Matt