Posted by Mike M. on Wednesday, January 14, 2004 at 4:58PM :
In Reply to: My 51 B-3 has a tag under the VIN tag on the door jamb posted by Tom J on Sunday, January 11, 2004 at 7:25PM :
the first 2 numbers were when it was designed 43= WDX, B-1-PW and B-2-PW. Next number 50 or 51 is when they changed the cab design.