I use a carpenter's level and feeler gauges. It has a nice machined surface. If I have doubts about the surface of the level I just turn it around and measure again. If the level's surface was not true, the apparent warp would change.


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!