MARLIN - Yep, H & SH take six quarts of oil, M/SM etc take eight. To keep the ratio of oil to kero the same in a 1-1/2 quart Kohler about a Shot Glass of kero would just about right!
Couple yrs ago I took the block heater off the M, Dad had it plumbed into the heat gauge port on the head. The port with a TEE wouldn't work for both temp gauge & block heater, the temp gauge wouldn't be inside the water jacket and almost always show cold, BT-DT. We drilled an extra port into the Super H's head years ago so both the temp gauge and block heater work. Both heaters sat right under the air cleaner and tapped water from the block drain behind the carb.
I found out 24 yrs ago it s possible to put TOO BIG a block heater on an engine. I didn't get the factory block heater on my '87 F150 w/300-6 when I found out it was only 500W. I plumbed in a 1500W tank-type. Plenty of places to plumb into the cooling system, but the water would get so hot it would shut off after only a few minutes. I think 1000-1200 W would have been plenty. My PSD has a 1000W installed into the rear header plate of the tube-inside-a-tube oil cooler so it heats both water & oil. Works great! I had the truck sitting outside the shop in Zero degree temps for two days with the heater plugged in a couple months ago, 15W-40 oil in the engine. When I went to put it in the shop the engine sprang to life like it was 90 out!
ANYTHING you can do to get either gas or diesel engines warmed up before starting pays benefits with longer starter & battery life. Plus the engine typically lasts years longer too. Cold starts in summer are not good but cold starts in winter are REALLY hard on engines. Guy my Dad drove for years ago tryied to start a 220 Cummins with 30W oil in it during zero degree temps. Never did get it started until AFTER it was rebuilt by the Riverside IH truck shop in Davenport from spinning some main & rod bearings due to insufficient oiling due to the thick oil.