don't even think about running an eaton without an intercooler... you might be able to get away with running the kenne bell twin screw blower for the escape (sans the intercooler) with low boost (twin screw run cooler then roots, giving more hp at the same boost level) the only data i saw to prove this was provided in a test "sponsered" by kenne bell, and was probably slightly "skewed". the kenne bell kits are fairly resonable, and the cost of the extra r&d would still keep it below what the turbo kit is going to run u. i think this would be cool for someone to try.
lol 151cube engine with a 112cube eaton... there is a guy with a "eaton takeoff" that is 160cubes.... lol the blower would have more displacement then the engine... hehe...
i think the m90 would even be a bit much for the duratech... maybe the m62 would be more appropriate...