I've seen quite a sizable toolboxes on the step behind the driver's door on 1940-42 Australian army Chevys in old photographs.

Zacca

"After you skin yer knuckles, Mr Shifter ain't yer friend any more."

1942 Chevy 3/4 ton
In the Stovebolt Gallery
Photo Site
1946 Chevy 5 window coupe/ute (new stray)
2000 Nissan Patrol 4x4 4.5l turbo diesel