I may have caused some confusion. But in my sill there is no hole and the hole in the pic I posted was from jos48panel which is a larger funnel shape as GMONIZ described.

So apparently the earlier models did have a different tire carrier.

Thanks all for the clarification.

1951 Chevy 1-Ton Panel
In the Stovebolt Gallery
Pictures of the restoration on Photobucket
Now cruising in the Passing Lane
RIP good friend.