HDK Bump Steer 101

The Longacre Bump Steer guage has been around forever and is a
handy and useful tool that can be used in any home shop.

http://www.longacreracing.com/catalog/item.asp?id=155&catid=5

The assemblers of the HDK's, Streicher Racing (builders of the Hawk
USAC Midget) very well may have one. Denny eats lunch with these
guys most every day, so it's possible that one could be available to
take a "precision numerical measurement" as you put it.

I do know that I observed the whole process closely and the guage
appeared to not vary at all.....of course a digital dial indicator would
be more accurate than my aged eyes.

http://www.theracedepot.com/product7.htm