the clear lexan actually holds up very well ,it will however get some scratchs.as b said it is great to have the clear ,you can see if any bolts come loose or what ever.it is very tough and will not break easily.
you must have your clutch case modded to run the lockup.you can have this mod done get the lockup and the bearing kit for 250 and up depending where you go and who you get it from.