Autolite 45 if memory serves, gapped 35 with non electronic ign, 45 with electronic ign.
Use base line pump gas, no need for any upgrades or additives for daily driver.
I put 5 qts. of 10W30 any brand, with filter in mine, some say 6, but that is all I have ever used for 40 years. More important to change the oil every 3000-5000 miles than to use boutique oils in these ol motors.
Spend as much of your jingle as you want on bells and whistles, but IMHO regular changes beats $7.00 a qt everyday.
John