Yes, MM Pushed LP. in an MM Engine, the LP was built as heavy as a Diesel, it was more fuel Efficient, Had Higher Horsepower & Could last many times longer between required overhauls. There are MM Power Units with over 100,000 hours on them!
So far the Peterson / Beemer Book is the best on MM Tractors. I am slowly working on a book that will be much more comprehensive, covering all Tractors, Engines, implements etc., many of which have not yet been covered in any of the MM books. ~ Marty