A lot of folks say they are running a Mor-Drop axle but how does one know for sure? I've got first dibs on an old dropped Model A axle. The work looks good. In fact, it looks a lot like the Mor-Drop I bought at Blair's Speed Shop in Pasadena in the late 50s ($15 exchange). I'd like to ID the shop that did it if possible. Are there any distinguishing characteristics I should be looking for?