[deadtrend1]

This is a example of why a signiture with some general info on your car helps. This a 305 or a 2.8 RS?

Shouldn't matter though .. anyways....normally its a 1156 bulb. Standard single filiment taillight/reverse light bulb.

for timing, a lot of TBI people run 5-6 degrees base advance. You can do that but if you hear pinging then back it down to 2-3 degrees. Remember to disconnect the EST wire.