Schémas électrique des Harley-Davidson Big Twin. Wiring diagrams for ... 1973 ...1973 Shovelhead Wiring Diagram - Aug 22, 2011 · John, casting number 112Ã¢â‚¬â€œ392 was used on left-hand cases cast as early as May 1938 and it seems to have remained in use through 1973 models (Servi-Cars), even though there was a minor change to the casting itself for 1964 and later models (Servi-Cars).. Jun 17, 2011 · You can't put pan covers on a shovel. I haven't seen the "fake" pan covers like they make for Evo engines either. If you want a panhead, I recommend you go with the '58 rather then trying to change a shovel into a panhead.. How To Use the Fix My Hog Website. START HERE! We posted this video to help you navigate Fix My Hog and find what you need. Please watch it and let us know what you think about our site and videos..