Monomorphizing GHC Core?

Has anyone worked on a monomorphizing transformation for GHC Core? I understand that polymorphic recursion presents a challenge, and I do indeed want to work with polymorphic recursion but only on types for which the recursion bottoms out statically (i.e., each recursive call is on a smaller type). I'm aiming at writing high-level polymorphic code and generating monomorphic code on unboxed values. This work is part of a project for compiling Haskell to hardware, described on my blog (http://conal.net). Thanks, - Conal