My furrin books only go back to 1955. I used to work in a large yard that was closing and relocating. The boss said to toss all the old Hollanders in the dumpster, so I backed the "dumpster" I was driving over to the door and loaded up. Downright incredible what you can learn from these, but as you stated, they don't cover everything. I've been contemplating the creation of a Mopar only interchange manual for years, but not sure how to go about it, since copying info from Hollander would be a no-no.