I have an H that is guttless too. I was thinking mine was a distillate engine originally therefore built for low compression. It has the 3rd hole in the hood for a gasoline tank. Mine will at least pull hills in 5th gear with no major load. These are not NW Iowa sized hills though.
My dad has a super H and it has power comparable if not more than his worn out M. It makes me wonder if the H that you are speaking of has not been rebuilt to super H specs.
I would take 4 clyinder power over 2cylinder any day of the week. They sound nice but that is about it in my opinion. Very crude old beasts until the 3000 and 4000 series in the 60's.