Autolite or Motorcraft... that's what came with the cars back in the day. I have some Autolites in my '71 right now. Fires right up, doesn't 'sputter or miss until it warms up,' or anything like that - even with a not-100% tuned 4bbl carb.
Don't waste your time with the Split-Fires, Bosch Iridium Tips, NGK Platinums, or XYZ Unobtainium Triple Core Snake Oil filled Super-Dupers - they're spark plugs... they spark until it's time to change them out for new ones. Non-exotic plugs work well, and last about as long as you'd really want them to last between tune-ups... and are cheap enough to simply replace every 3rd or 4th oil change (you're going to pull them every time you tune up the engine to make sure the gaps are right, anyway... right?)
I've gone down that road in both my '97 Ram and '80 Jeep. I tried the Bosch Platinums in the Jeep (had a couple of cores delaminate, slide out and close the gap - killing the affected cylinders, of course). I tried Champion Truck plugs in the Ram, with no change in performance, but a minor drop in mpgs. I also tried Split-Fires in my '85 Nissan 4x4 (hoping they would resolve a misfiring issue I had - nope). The only noticeable difference with all of those different kinds of plugs, was how much lighter my wallet was each time I came back from the parts store with the latest snake-oil spark plugs.
Champions. Straight-up, old school, 'the ones recommended for the car' Champions, are what's in my Jeep... and it runs better than ever. Same with my '97 Ram... the new owner asked what plugs to use, I told him the history, and he said he'll get another set of Champions when it's time to replace the ones in there now.
Maybe it was all psychological, but it just seems like none of those 'too good to be true' money-grabber plugs really did anything except cost me more money.
WIX, Fram, Motorcraft [oil filter] - whatever you like. Some supposedly work better than others... most do not [work any better than others]. I gave up trying to spend more money on negligible return big name-brand things - like K&N. Love their air filters... oil filters, not so much. I like their air filters because I can clean and reuse them whenever I like, but the oil filters are just more expensive and don't do a whole lot differently than the others I mentioned above.
I won't even talk about motor oil.
