I have one of those same engines in a GMC truck currently, and I LOVE that engine! It puts out much more than 100hp, closer to 150hp, and should do just fine in your Deuce.
DO NOT USE MULTI-GRADE OIL IN THAT DETROIT!!! That will cause scoring on your pistons & liners; use only DETERGENT-TYPE low-ash single-grade 40wt (or 30wt if you have cold winters) oil, such as Shell Rotella or Chevron Delo. The old 2-stroke diesels love to rev, they are very efficient & are good on mileage if driven properly. They do NOT like to idle for long periods of time, as that will cause the top of the piston to overheat. When working under load, they keep pretty cool due to their design.
I love my old 4-53T industrial engine! Good score!
When temperatures drop below 40-degrees F, I use 2 magnetic block heaters to keep the engine warm & ready to fire...they work great. A frost plug wouldn't hurt either, for me the magnetic block heaters are inexpensive & work great in the rare times of very cold weather.