Solid flames... Too tacky. But, I'm a purist. Flames belong on muscle cars... and not on all muscle cars. A Cobra 427 for example wouldn't look right with flames.
Ghost flames might work... but won't show well on white, so why bother? the cost is not going to be cheap by any means. It isn't easy to shoot pearl on white and have it turn out right. There isn't enough contrast. The paint guy would have to spray so much of it to make it show up enough... and in order to get there he'd have to guess as he goes since the white areas near where he's painting will be masked up. Not easy to get side by side comparison to see where he's at with the pearl. I once talked to a Cobra owner who had a white 427 with ghost stripes. He had to reshoot it 4 times to get it right. That's not reshoot like spray on more paint. That's sand, shoot, let dry, polish, and see how it looks for four times. That's more than a solid week of work.
And, the if you don't like the result... you're out $2000 and up... and that's a very loose estimate. Anyone who cares about doing it right will charge more than that easily.
Another thing, if you ever get chips in the paint (a fact of life)... well, you better get to know the paint guy very well. Because if you don't already, you will. Pearl is impossible to match.