Jay,
You are talking about one of my favorite type of trucks. I'm a big 9500, C-90 fan. If you could post the picture, I may be able to help. Those trucks were made from '66 to about '77, maybe early '78, altho some years are identical to others.
Also, I recently posted a link to a picture of a GMC 9500 Extended Hood under the topic "I got a few questions" (Approx 18 down).
Bill
