Retrobuilt fuses custom fiberglass body panels to the existing rear quarter panels and door skins and then replaced the front fenders, hood and rear deck with fiberglass parts. They also add custom exhaust, suspension and air intake to maximize performance.
It takes about 6 weeks and $30K (not including the 2012 Mustang) to convert one.
But wait, there's more... Not to be out done Eckert's Rod & Custom in Molalla, Oregon got the bright idea to fuse a '69 Mach 1 and a 2006 GT 40. At this years SEMA convention in Las Vegas they unveiled The Mach 40!
The Mach 40 won the award for Best Hot Rod & overall Best in Show. But, it will set you back quite a bit more than $30K.