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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 02-03-2011, 11:48 PM   #11
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Quick answers from my quick searches:

Every GM 3800 uses a 60 V6 bellhousing pattern. To get a 3800 to attach to a 6-speed transmission, you need an adapter.
That adapter goes on a T56, and then you can bolt a 3800 or some such engine to it.

For the M90, you can go a couple different ways. There is the Australian route that will directly bolt up to the 3800'* heads, or you can entirely cut off the TB part of the supercharger, weld on a 90-180 pipe, and weld onto that a TB adapter. I've actually seen that done (in person, so no pics), but generally anything is possible.

Whatever you end up doing, please take tons of pictures!

94 STEi and 99 SLO
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