Magnum Engineering do the cheap kit to fit the small block Ford, but if you are good at engineering you can make up your own mounts easily.

A guy called Jim Deberry sells the fully blown XR8 conversion parts but they are a fortune.

Friend of mine has recently turbo converted his 6 litre Trans-am, used Holset turbos from truck scrap yards cheap as chips. His manifolds are just V8 truck ones turned up side down LOL!