i have a complete 5.3 that i can buy very cheap that i was going to build up and replace my 5.3 with. Was wondering where i could go "website" that sells engine kits or rotating assemblies. was wanting to bore it out and go with a bigger rotating assembly. also what kind of exhaust kit can i buy with 6in fabtech lift or do i have to get custom fitment? was hoping i could get complete exhaust setup with headers that fit. wanting to add 3 inch body lift also and did not know how that would affect exhaust system. thanks a ton guys. 01 silverado 1500 5.3L with six inch fabtech lift.