How old is it? Sounds like a points/condenser issue. I’ve got the same engine circa 1988 and have found all aftermarket ignition products to be inferior in size and quality. Watch the cap and rotor for correct contact and file/burnish your points for a square contact.
I had this problem last year, although I think mine was a bit worse. Monroe County took 35 gallons of water soaked gasoline from me at their ecopark as they collect old paint, varnish, etc. They were VERY clear about not accepting a 55 gallon drum.
I use RTIC on my boat. Call it the coffin. Very good for the price. I have a 20 for most trips and the truck, and a 65 for tournament days or when guys want to make a meat run. Very hard to beat for the money, IMO. Splash some bleach in it and your wife will never smell anything.