Farmall H missing

Hello,
I have a Farmall H batt, distributor ignition type that has taken to missing badly. I cleaned and gapped the points (.020) and the plugs (.023).It has new wires with stainless conductors and new plugs. Is there anything else in the ignition or could it be carburation or valve trouble?
Thanks, YVC

Have you cleaned an or rebuilt that carb?

Missing is rarely carb. I would check and adjust valve clearances regardless of miss even if it ran perfect on a new to me tractor that is this old. Look for bent pushrod from a stuck valve when you do this. ( pushrod can be straightened in a pinch)

Some new plugs are sometimes bad out of the box. If you can determine which cylinder is missing by pulling wires and listening to engine then try new plug in that cylinder. ( I always keep my old plugs that I know were firing to use for testing if nothing else)

If missing is random across the board and moves around to different cylinders then I would suspect condenser. Even new ones are sometimes junk. (again I always keep my old working condensers to use for testing if nothing else).

Coils can cause missing too but less rare and they usually act up when hot.

When you gapped your points did you run a piece of brown paper bag, business card, or even a dollar bill through them afterwards to clean up oil residue from feeler gauges? Lots of people oil their feeler gauges to prevent rusting and this oil residue can cause problems on the point contacts.

Compression test will tell the story too if you suspect burnt valve...

Have never heard of stainless wires. Copper cored wires were always the type of choice for these old tractors.

somebody steel it or you misplaced it? lol.
you need to do a compression check and go from there. low compression or a burnt valve and there is your miss. a carboned plug will also point you to the bad cyl.
in a tune up compression check and valve adjustment is standard procedure.

A miss can be many things. Check the spark at all 4 plug wires and make sure you get a spark at all 4 that jump a 1/4 inch gap or more with a nice blue/white spark. You may have a bad distributor cap or rotor. Or it could be the distributor bushing letting the point not open the same at all 4 lobes which would also cause that as will a valve not set as they should be. Valves tend to close the gap over the years so then they do not close all the way and cause odd problems

Could be missing because you have a leak on the intake manifold. Does it run better if you choke it a bit?

It could also be caused by a broken spring in the auto advance flyweight in the distributor

I had a problem with my SM missing after I changed out all the plugs, wires, points and etc. I don't know if I would have said it was missing "badly" but it would miss any time I opened the throttle. Rechecked everything a few times and all was well except my new wires were not copper. Changed to copper and no more miss.

Could be ANYTHING, have to troubleshoot.