Well duh. My point was that high power levels can make a box last longer if you are nice to it. Most people with 450lbft use it liberally. A car with 450lbft driven by my grandmother would have a standard gearbox last a long time.

Thankfully the options for big spec gearboxes are cheaper for me over here. Tremec who now owns Bog Warbler makes some great gearboxes that laugh in a modded Cosworth YB's face. I'm content with my stage III power and a standard box.

The options for 4x4 owners thin very quickly.