Years ago when the ramcharger hole was not pre-cut I taped a fine point pen to a piece of 7/16" keystock and used it as a gauge to trace around the trap door, I fortunately had a measurement from the rear of the decal to the outline around the trap door from an original R/T. Then measured and taped the trap door onto the decal and traced, then cut with X-acto knife.Thanks for all the replies.
Well, hopefully I can find a top quality hood decal that has the Ramcharger hole pre cut. I don’t want to mess around trying to cut that hole