It was running ok, now it’s terrible, I need help!!!

He stated the dwell was 45*.

This could be so many thinks:
- water in fuel
- sediment blocking jets in carb
- cam lobes going flat
- ign/electrical.

I am leaning towards electrical. It is also external. Check: plug wires & spark plugs [ or replace ]; inspect dist cap, rotor for carbon tracking; coil; try another points condenser.