The box I’m using is rods old box. It’s a good box that stood the test of time with a lot of torque chucked at it so a shame for it to go to waste. It’s a bit of a Frankenstein box as well. It has the later tko 500 mainshaft that’s the same thickness end too end. Which also has the larger rear main shaft bearing. Now has the 500/600 one piece counter shaft as well and carbon synchro’s on 2nd 3rd and 4th. Will be plenty man enough for mine