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If using aluminum I'd be much more worried about how to get a decent weld than the effects of dissimilar metals on corrosion.

R.



I would actually be more worried about life and fatigue. Steel is fairly straightforward. If you design the load below a given threshold the life is functionally infinite. Aluminum has no such threshold. That is why aluminum parts on air frames are replaced on a schedule. I have never designed with aluminum for service life (steel - yes), so maybe the Corvette engineers know something I do not. Just not so comfortable with an aftermarket aluminum frame. The life testing and level of vetting the OEMs do is not really attainable for aftermarket suppliers.

Michael 1968 Barracuda Notchback Coupe 440 EFI 6-pack, T56 Magnum 6-spd