A 1936-1948 346ci flathead Cadillac, the first GM engine with hydraulic lifters. Those things are as heavy as a Cat diesel! They weigh 900 lbs!!
I hate to think what that truck was like to steer!!
I have one in my yard, it was one of two industrial engines installed in 1938 in a local theatre, to drive backup generators.
The local power supply was a little unreliable back then, so the Cadillacs were there to ensure the show or movie went on, in the event of a blackout!
The theatre was in the middle of the city and developers knocked it down in Feb 1974.
The sad part is, they simply flattened everything, they dropped roof girders onto the Cadillac generators, smashing lots of the engines accessories, and then just sold them for scrap metal.
The brother and I bought one from a scrap dealer around 1975, with the intention of using it as source of electric power on the gold mine we owned.
But then we found the smashed carburettor and distributor weren't available any more, so it languished for 15 years in our yard in the country - and then when we sold the land in the country in 1990, I took it with me back to my workshop in the city.
I bought a good used carburettor and distributor off eBay, plus other small parts, from sellers in the U.S., around about 2007-2010.
I also acquired new valves and a new gasket set for it, but new pistons have become especially pricey for these engines, so it's still awaiting restoration.