I do UNHOLY things to my rebuilt 63A dogleg 5spd, and it absolutely LOVES it. They aren't meant to be as strong as the Toyota boxes, But the way mine laps up the PUNISHMENT it's hard to imagine it ever failing. When I took my mate for a ride yesterday, the very first thing he said was, "What gearbox are you runing?" after I hammered 2nd. The way I (mis)treat it often raises an eyebrow from my mates, which always makes me lol. Mechanical sympathy is for women and old people