From the Grand Sport Registry site, here are the numbers:
14. Q: What are the dimensions of the Grand Sport pinstripes?
The factory 2-color decal pinstripes are 1/4" wide (white) and 1/4" (blue) measured out from the wide center stripe. Actually, they are just a tiny bit narrower than this, but 1/4" is plenty close enough. From the front of the car going back, measuring across the wide center stripe only (not including the pinstripes):
- at the very bottom of the nose below the front license plate: 17"
- across "Corvette" on the front license plate cover: 17-1/8"
- across the Corvette emblem on the nose: 18"
- even with the top of the headlamp openings: 19"
- 1/2 way up the hood: 20"
- at the rear of the hood: 21-1/4"
- across the top, front (coupe): 19-5/16"
- across the top, middle (coupe): 19"
- across the top, back (coupe): 18-5/8"
- across the gas cap: 17"
- across "Corvette" at the rear: 16-7/8"
- below the rear license plate: 16-3/4"
You can find this and lots more about Grand Sports at
www.grandsportregistry.com.
My version is a little different but close enough.
17" at the front plate area
18" at the gap between the front bumper and the hood
22" at the rear of the hood - the stripes max width follows the hood's power bulge and 1" inside
18.5" across the targa top and halo bar
18.5" on the rear deck and bumper
I had the "pinstripes" painted on also.