Hrm.. I would say just put "C O N T O U R" across the front and then across the back window put "S V T". It'll look good

But, are you planning on doing the lettering with tint films? or just want to put the lettering under the tint? Or just wanted to know about the lettering and how it would make your soon to be tinted car look?
Either way.. Contour front- Svt back.
By the way, how dark are you tinting?