Big wheelie, I would suggest scallops. Flames may look simple, but there are a lot of subtle elements that have to be right, or they will look amaturish.

Find an example of scallops on your body style, then you can mark the approximate location of the ends, and use a tape measure or yardstick to make them parrallel to the rocker panel and each other, and to keep them evenly spaced. Success will come a lot easier with the scallops....and you will have a little more unique vehicle, since flames have been so common.

If you are daring, I would suggest a fine 'flake, as that is a coming trend, but dates back to an early era like scallops do.

I'll see what pictures I have saved.