Well it's a little early for me to be worried about my headlights, but, since I'm broke and this didn't cost me anything, I thought I would just do it. I had some JW Speaker headlights from my jeep and since I love the PCHRODS C10R, there was no other option but to put them in the C10. I had to do some modifications to the headlight bucket but it was very easy. All I had to do was trim the buckets with some tin snips. I do not know if I have to trim the core support yet but I will keep you posted. They fit in beautifully. Just take your time and trim little by little to get them to set in all the way. I'm going to use a dremel to clean the edges up a little and paint them. You can see in the pics how much I had to trim off.