After asking around I have some more data though I can't confirm/deny much of it.
Most think the blue print were on earlier (than Mustang) Fords like 60-63. Some have suggested they made it to some 64.5 cars.
NJ stamps are as Jeff suggested reguarding date and inspector having simple black stamp like a common date stamper, initials only for inspector. Most think sp. gravity readings were in the reading line (sidebar, 1260 or 1.26 is considered fully charged or 1.26 times the weight of plain water)
CJ eqipped cars had no decals
[color:blue]MCA Gold card judge 67-68 Shelby
Certified judge 65-70 Shelby, 67-68 Mustang[/color]