My projected horse power would be around 700-600 engine. What would be a proper clucth setup also should I look into upgrading any internals in the M6 and if so what needs to be ugraded and to what?

the McLeod street twin clutch will handle the power nicely

For sure, the Street Twin for a clutch. The stock tranny will be fine if you use street tires. If you are going to use sticky tires, I suggest you look into the T56 upgrades offerred by G-Force.

Rich