You could also find an original 1941-46 oil pressure gauge for a GMC. The GMC gauge is 0-80 PSI as engines were already insert bearings at that time. Swapping the face plate and painting the needle to the Chevrolet color scheme will make your alteration nearly invisible. You will have to remember the true PSI as the original dash cluster glass will still read the low oil pressure markings of a splash oiler (ie, half way on the gauge will now mean 40 PSI vs the 15 PSI indicated on the glass)..


1941 Chevy 1 1/2-ton WW2 4x4 dump truck
In the Stovebolt Gallery
Lots more pictures