How To: 1944 Chev HUW restoration

[Bruce Parker (RIP)]

i finished up the repairs on the cab and front cowl and they got a coat of primer today.

i did find one odd thing perhaps another HUP/HUW owner can verify. On the cowl, passenger side floor there was a rough hole about an inch long and maybe 3/8" wide. Because it was rough and it somewhat matched another hole punched through the front just inboard of the headlamp socket I figured 'bubba' did it post war and I patched both holes. But when I looked at the underside of the hole through the cowl floor I saw that the sheet metal panel where it was was factory notched, perfectly rectangular. Bubba would not have done that even if he could reach it. So I think I patched a factory hole. But for what? Could it be the wire to the map lamp? I've attached a sketch of what might be if anyone can confirm or deny.