Here's some photographs from JBS's '75 Shovelhead Rebuild blog. Cool stuff!
This bike has a long history, but not much of a life. My dad bought the crated engine new from a Harley shop back in '75, a used 4 speed tranny, and a hardtail frame (he thinks it's a Paughco). From there he built a bare-bones bike that didn't get ridden much.
Sometime in '81 he was in a minor wreck, which tweaked the Sportster front end that he had put on it. Having four kids and an on-again, off-again construction job, family responsibilities usurped his wish to put it back on the road.
With what I'm sure was a broken heart, he watched his bike sit, in pieces, for more than two decades.