Best place for line loc switch?

I am not understanding what you two are talking about. Why would you need a line lock off the line? The car is not going any where untill you let off of the clutch. So you don't need it there.

I don't under stand what you mean by preloading ether. Lets say you lanch at 3000 RPM. You realy don't want to have the clutch out much as it will be tuching making a bunch of friction that is putting heat in to your clutch and you don't want that eather.