67 barracuda tail lite question.

2057 is a brighter bulb & wont cost that much(if any) more than the 1157. The 1157LL bulbs are just supposed to be a longer lasting(LL) version of the 1157. Not any brighter. You might want to check Sylvania's website & see if they list the wattage of the bulbs, or go to a parts supplier & ask to look at their catalog. You don't want to go too hot of a bulb because you may start to melt the lenses or sockets if for instance you are sitting in traffic with your foot on the brake. Bulbs get pretty hot. Eastwood sell a good reflective chrome paint to restore the reflector in the tail lamp, but you will have to disassemble the light to use it.