Opinions on 4 speed with OD

Can we define 'abuse' in terms of what kills the aluminum case a833's? Is it burnouts and clutch drops? Lots of shifting loading and unloading the countershaft? Heavy downshifting? Or...?

I've little experience with them (and own at least three of them), but seems to me it would do fine even in a high torque car if you're running mild street tires and aren't clutch dropping frequently, but I don't really know.

In a street car driven reasonably most of the time, I'm wondering if it would really have trouble keeping up.

The issue with the aluminum case is the lower shaft is a loose fit in the case which allows the gears to move in relation to each other under high loads that wouldn't affect the steel case. The case can be modified with a bushing that tightens up the fit and gives the same performance as the steel cases.