1998-2002 pontiac firebird/formula resin body?

[keviiin86]

I've got a revell 1998 trans am kit that I would like to turn into a formula..looking at it, it doesn't seem like an easy task to modify the front and rear bumpers and scratch build a hatch wing.  I know AMT made some 93-97 formulas but it appears they didn't make it with a realistic rear bumper, just uses the T/A bumper instead and nothing else in the kit would be of any use to me.  I would like to replicate my car if at all possible.