Hi, I just purchased a Ford Pickup Hotrod that what the Previous owner Said has is an original straight axle that was heated and dropped back in the 50-60s in the US. Can anybody expand on these or the spelling of Dayco? I’m unsure if I misspelled it? I’m curious the history of these. Sounds like a company by the name of Dayco use to do this. The I beam axle is also drilled. He told me they were pretty rare. Thanks in advance.