I have been the lucky recipient of a neighbor with a 3D printer and have been exploring projects. I am a sucker for old iron and my brother collects F-M engines manufactured prior to 1930. This "make" is a free download from thingiverse, and I substanially modified it. It is scaled after a 22 HP throttle governed NB, tank cooled, with 72" flywheels. The truck is a Don Mills Mack LT flatbed. again, sucker for old iron. Enjoy.