you need to take your 1156 socket with you to match it up so that it will fit the hole and lock into place. that is why most just use there old 1157s from the tail light housing. you will use stock 1157 bulbs unless you want them superbright like rockadous's bike
his are the silverstars about 10 bucks for them, they are a different style of 1157 bulbs, but the stock factory style will work just fine.
if you can not find a set of 1157s that fit the front,and your still running the stock taillight, you can do this, take the sockets out of the taillight move them to the front, get two more 1157s from the parts store made close as possible to the orginal rears and put them in the rear, theres two plates that hold the sockets in the back tail that will lock down on just about any socket style that is close and keep them in place. .