Welcome to the bolt! Toss some pictures up when ya can, we all like to live vicariously through other peoples projects. wink

I'll leave the ignition Q to others, but oil is an easy one. Like 3B says, Zinc is your friend, yet modern oils are low in Zinc. However, many of your comercial grade diesel engine oils still have fair levels of zinc. Probably the easiest to find would be Shell Rotella T. I run straight 30WT in my old beastie year round, but that's mostly because it's the one that'always in stock.

1956 GMC 370 dump " 'Tater "
1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI

I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P