1) What is the distance from the rear edge of the shaker trim ring to the rear edge of the hood on a '70 Challenger shaker hood, measured along the longitudinal centerline?

2) Is the central spine or rib on the shaker hood more pronounced than on a standard (flat) hood?

3) Were hood pins optional for '70 Challenger shaker hoods?

4) Are '70-'71 Dodge and Plymouth shaker scoops (the visible top piece which pokes through the hood) the same part?

TIA.