Help Identify this Century Carburetor

I was given this and was wondering what y'all can tell me about it, I know its a propane conversion carburetor but can't find info on it anywhere. here's some photos for y'all to see. lol I have some bigger ones 2856x2142 size oh the same photos if you need them.

http://img35.imageshack.us/img35/2716/1003192u.jpg
http://img17.imageshack.us/img17/1633/1003193b.jpg
http://img17.imageshack.us/my.php?image=1003193b.jpg
http://img37.imageshack.us/img37/8955/1003194.jpg
http://img39.imageshack.us/img39/804/1003195.jpg
http://img13.imageshack.us/img13/2104/1003197a.jpg
http://img529.imageshack.us/img529/581/1003198p.jpg

 

If i had a guess, it's not a century carb, but a marvel schebler? used in a tractor? like i said, i'm no pro, and it's just a guess.

 

It's a 2 barrel with a Ford/Holley base for a Ford or IHC 2 ton truck. The gold colored box with the diapham on the side is for a centrivac overspeed governor. Century was built by Marvel schebler division of Borg Warner corp. The current Century line can be viewed at centuryproductsonline.com.