LED's have a more intense light and they also respond to the signal faster when you apply the brake. Faster reponding and brighter to, it's a win win!
I can't respond on Keith's question though.
I removed my lower pad from my '68 Cuda for the first time this last week. The pad had 5 or 6 studs that went through the sheet metal. My seat and wiring harness is out which made the job much easier I'm thinking. Good luck...