Glad to hear you got the straight cut box sold, hope you were happy with the money you got for it. Not sure if this is of any help but as far as I know I use a standard 4x4 clutch in mine and that's been dyno'd at 348bhp at the hubs and seems to be fine and quite light under foot. I'm sure the reduced weight of the car will help the clutch deal with the added power. I'm running a T34.63.