Here’s a gallery of images (and captions) showing some of the build process.
Notice the white oil pump and lifter stools. During the war the government stopped the use of all aluminum based paint. 
Completed engine ready for the run stand 
Shimming the generator for the correct gear clearance. 
Final assembly process. Setting timing, etc
And here’s a video of the initial startup. The ‘runstand’ that it’s sitting on is actually a product of ours that we’ve been refining to eventually manufacture and offer to the public. We can run engines on them from the 30’s – 90’s.