HotRod,
I have been trying to find out information on this for a while. The photos in the manual seem to show a seal that is mounted on the inside of the front cover, for the 1 Ton.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!