forgive me if anyone has covered this already. I myself am looking to do some front end mixing , to start my vehicle is an 03 denali already done the hd hood swap however i want rid of the denali grill to swap in an 06 style 3500 grill and want to possibly utilize the denali bumper not against using the 06 but the denali is the plan for now i realize this may entail some modification to the denali bumper for fitment . My question is i know the running lights are shaped different and im not against cutting them into the 3500 grill however my factory items are foggy and need replaced are the headlight assemblies the same or different anybody have the knowledge of a parts list i may need? Ultimately my primary objective is the grill installation if i can keep the bumper great but im not against swapping it buying new headlights and running lights can i run the denali units with slight mod for running lights and if not will 3500 units bolt to the denali factory mounts sorry long winded just wanna be certain im understood