I would think it would be a problem getting a vinyl stick-on stripes to line up straight.
I painted my stripes myself and I think it took 2 hours and lots of attempts to get it taped and laid out correctly. I can not imagine it would be easy to get it correct in 1 attempt when removing the backing paper.
I used the above website for the stripe dimensions and locations.
Here are some pictures of painting the stripes:
http://chris66dad.tripod.com/id23.html
Good Luck
Ron
http://chris66dad.tripod.com/
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A code 66 coupe
289 4v, Roller Rockers, Electric fan
Performer & 650 Edelbrock
MSD ignition
Tri Y into 2.25 Shelby side exhaust
T5 conversion & Hydraulic clutch
CSRP Discs