I tried them, front and rear. They worked ok in the front, but on the rear the bulb is located somewhat low in the housing. This made for it only illuminating the lower area effectively. It didn't help that I have blue dots. I ended up using a Technostalgia kit that uses a panel od leds instead of just thbulb part. It illuminates the whole lens evenly. I did make a modification to it to allow the blue dod to work. I basically made a mall bracket with a blue led license plate bolt, along with a sheild to block the red light, and mounted that behind the dot. I have also recently changed out the 9 element leds that I had in the front to 21 elements leds for better visibility. I will warn anyone considering these, they will not fit into the housings on a '55-'57 Chevy without some modification. Seems that the base is too short to go all the way down into the retainer slots to lock it. I modified the slots by grinding in my own. They do look good now that i have them in.
