You got to do SOMETHING to make it corner better, (bilsteins alone ain't gonna cut it!).
However I love the idea, but I'd probably go with a super/turbocharged flat 4 instead. Would be much cheaper to build, with around the same hp.
Unless you have flat 6 parts laying around
Is that a totally stock, nice example of a 24 window? If so, think twice before going with what you planned. Why not pick up something that needs some body work, etc. while you're at it, and not mess with an original example?
However, I love the idea no less, whatever you do, please post updates, and good luck.
Ahmet
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It's all the driver...