from what ive found, the eatons i was looking at pairing up are the M90's.
not to say that it will work as i planned, but plan to pair them up on a custom intake and just play with it! as far as fuel delivery, will need to check to see if they can be adapted to run outside the box of normal use like on the small motors they come with.
as for the eaton superchargers. what i have found from an instant glance; the m62 are the small 2.2L motors etc(cobalt ss), the m90 runs the 2.2L-5.0L etc. my simple reasoning may be incredibly wrong but as if with turbos; pairing up smaller turbos help run the bigger power numbers. SO...pair up smaller superchargers help run a larger Litre motor?! we will see tho
BOB, i think you could get away with using a M62 or M90 easily for the inline 6 and be happy with the results, just would need to fab an intake to mount it all up