Dennis,
I got the 7" in a Memphis Pop Top. If I do it again I'll get the 9". The 7" fits down over the back end of the head light, but it won't fit around the widest part in the front of the light. The lamp itself is 7 inches in diameter. The cowl adds about another inch overall. If you get the 9" you will have about half an inch gap around the edge.
Rob, how does the 7" fit for you?
Cody
