I think you should start thinking size.. Find a box about 18x9x12 (aprox size of the m90) and some string (the belt need to run it) and see if you can find a place to get it to fit.
For those that do not know what an m90 looks like..
Eaton m90 page Also a
how guide on the custom m90 build of a laser, includes how to make you own plenum.
The one question I would like to know is how did Ford get it to fit the Eaton into the Eliminator?