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

things are looking up. I replaced the cap and rotor and checked the timing. That seems to have things running much better, I had the exhaust replaced today which really quieted things down. I guess my next job is to replace the harmonic balancer so I can time it correctly. I’ll be looking for some help and guidance in swapping it out. I will see what the Damper Dudes can do for me.
Thanks for all your help
Bill