I've got a 1999 silverado single cab 5spd , I'm looking to turn this into an SS single cab . But of course I can't ride around with the exterior modified as an SS and not have any balls under the hood .. I'm not sure what 8cyl I'm going to go with just yet a regular 350,LT1 and an LS1 is what I have in mind .. However in not sure what else i need besides tranny and motor mounts. I've been told I may need to swap out cross member and drive shaft as well .. Can anybody help me out here ??