The motors were built by White, who also put them in the 2-135 and 2-155 farm tractors. We have always used the Implement & Tractor manual for the rebuild information for all of the engines in our trucks regardless of the maker or year. We have torn down, checked and re-assembled or rebuilt several motors with these specs with excellent success. The military sends the same specs of these kind to all makers so they do not have parts interchangeability problems.
By the way, if you find one of these tractors in a salvage yard, you can take the oil filter assembly off the motor and put it on yours, giving you the spin-on filters. We typically pay about $60 for the assembly less the oil cooler.
Regards Marti