V8X is WRONG for an e-body, only b-bodies and a-bodies had this code. That is a repop tag and they screwed it up! '70 Challengers ONLY had 4 types of stripe codes and V8* wasn't one of them. The four stripe codes are as follows:
(*) denotes colour
1. Longtitudal R/T stripe = V6*, i.e.; V6X Black, V6W White, V6F Green, V6B Blue, V6R Red, V6M Magenta,
V6J Charteuse
2. Bumble Bee stripe = V9* (colours are the same except Red is V9E not V9R, and there are more color options
3. Pinstripe = V7*, (only two colors available: V7X Black and V7W white
4. Body side moulding = V5* (only available in V5X Black, V5W White, V5F Green, V5B Blue, V5R Red)
V68 is the code for 'Stripe Delete'
Hope this helps...