Haven’t run it yet, in the middle of building this 273 so I can keep the car running while I work out what I’m doing. And I think the gearbox will grenade, it’s a 904, with a 5800rpm stall,and a Dana 60 rear. When I built this 600hp was fast, now it’s not, and I’ve got a turbo xr Ute that is reasonably quick, I’m thinking of redoing this engine with turbos and a powerglide.