The last time I had it done was at "Sun Tamers" in Cartersville. They actually have a machine/program that cuts out the tiny perfect for your vehicle. I don't remember cost, but I highly recommend them.
That's what we ran on 20cyl EMD engines on towboats on the Ms river. Its probably one of the best conventional motor oils there is. I'd have no issues recommending this oil what so ever.
Take a striker off a matchbook & clean the points. However if you feel a "titty" on one you'll hafta file it. Ps most older tractors points are set @ .020 which happens to be the thickness of a paper match,