I'm building a M132 and want to mark it for the 11 ACR Vietnam. I have some photographs of M132s but can only clearly make out the "11 ACR" on the right side. As I remember, the drivers side should be "Squadron # HQ Vehicle ##". Can someone tell me if this is correct, and better yet, what the vehicle number (## above) should be for any of the three each 1/11, 2/11 or 3/11 Headquarters M132s. On one photograph it looks like "2 HQ 55". Also, the photographs I have of M132s all have serial numbers ranging from "12FA78" to "12FA90". Did all one hundred fifty M132A1s come from the same block of serial numbers?