I'm sorry Pink but you should know me by now. I like to give my honest opinion. I think having the three colors stacked up like that would not look right. It's too much. If you use that stripe I would suggest that you leave the whole car black, and have that stripe running down the side.
I also think that your previous plan was a very good one as well. having the pink on top really made the car look pretty good. You had a good mix of black and pink there.
I hope this helps with your decision.
PS: This is coming from a guy that never thought that he would say pink would look good on any car. Man this camaro looks good in every color.