Thanks for the info, might be my trucks christmas present ha
But to install the rubber grommets in the back of the stock housing. You just need a 1" wood drill bit. Shove her in the centre and take your time... if you rush it you will crack the plastic cover.
Size the bit up to your rubber grommets first to make sure the hole won't be too large. I am 99% sure It was a 1" bit. But just double check.
Remember to seal those grommets too, you don't want any moisture getting in your headlamp, than it just causes problems and looks like crap.
Just send a pm if you got any more questions, well when your over the 25 post mark lol
Have a good one
Justin