Last week I had a crazy idea, and I'm not sure how feasible it is. my idea was to bolt 2 Eaton m90's to a 3800. after thinking about it some more, it seems somewhat do able. the general idea would be to fabricate a mount to go on top of the existing m90, but to offset it, so the serpentine belt turns the 2nd blower. the top blower would be upside down so the blower outlet would be going straight up, then use an intercooler and some inlet/outlet tubing or something like the stattama intake manifold to dump the air into the intake pre maf sensor. I would use the bbv and run it off the existing vacuum lines, and just have it dump into the atmosphere. I'm not sure if the pcv would be needed.
the benefit would be double the boost for less than half the cost. obviously, if this was used on a car then there would be definite hood clearance issues.
am I forgetting anything? is it even worth trying? and fyi, if in the unlikely event that it is attempted, it would be on a dune buggy/sand rail both converted to drive on the street.