The STANDARD stripe on a '70 Challenger R/T was V60 (OPTIONAL colors), so if it was ordered without stripes, the stripe DELETE code would be V68. V90 (OPTIONAL colors) was a N/C (no cost/no charge) OPTION.
A66 was STANDARD with V90 (OPTIONAL colors), so if it was ordered without stripes, the stripe DELETE code would be V98.

Dave, What was "wrong" with your reproductions? How did they differ from factory applied?
I'm convinced (until proven wrong) that the 3505100-1 were factory applied on b-bodies, 3505102-3 were factory applied on e-bodies & WAG there were 3505104-5 for the Darts. The 3505100-1 saw life as the service replacement part for all body styles since it was the highest use factory pair.

'70 muscle car "SCAT PACK" Dodges:
a-body * 13,781 * Dart Swinger 340
e-body * 27,235 * Challenger R/T, R/T SE, T/A & A66 (#s exceeded projections)
b-body * 28,458 * Charger R/T, Coronet R/T, Super Bee