Amazing what some new parts will do for a 60 year old tractor !
I opened the gap on my plugs to .40 and I think it gave me a better spark too.
Yes the calcium helps a lot and I have chains on top of that.
Blowing a bit of snow here in the foothills but it is that light, fluffy Alberta snow, not the backbreaking, wet NB stuff you get down East.
My V-Type single stage snowblower works great here. I have some videos on YouTube of me blowing snow with that set up.