Quote:

In the Y view:
notations are 13.93" & 15" (positive) top-to-bottom from where?
and 130" & 133.82" (positive) front-to-back from where?





See above comment.

Quote:

In the Z view:
notations are 13.18" & 15" (positive) top-to-bottom from where?
and -50" & -50.34" (negative) front-to-back from where?



Front & back on the V9_ Challenger stripe drawings came from the front of the cowl top. I have not checked any other original cars against the drawings, but the one I did check was spot on.