Hey guys! Working on a retro for my car.. having some issues.. first being the projectors i got don't allow me to place my lens back on flush. OK so i need to cut some of the reflector I'm fine with that.. I have seen multiple threads where people say do and do not use silicone, so i am unsure of the answer. (for sealing where my projector would be mounted not the lens to housing). Also is there a diagram with the measurements of the headlights and the front end? I am going to use LED bulbs not HID and need to know if i may need to cut a hole for the bulb seeing how the projector is needed to stick out the back more.

Thanks all!

Well, urethane would be the best seal for headlights, but silicon could work if you cleaned it properly.
And I would need a couple pictures to help you with your other question.