clutch help?

It will have to be a multiple disc set up. This is not going to be cheap as the peripherals to install it will also be expensive and may even need to be made special.

800 is a lot of horsepower and the A-833 may not be up to the task. This is where you start looking at Jerichos, Libertys, Lencos or Jeffcos. There are other units out there but no matter how you slice it it's not going to be cheap.

BTW you'll be spending a lot of cash on the engine so don't scrimp on the trans or clutch either. A car's performance is a package deal, all the pieces have to work in harmony.