I know you are talking later model here but as info I had my 37 guage redone and calibrated for 60lbs back in 2000. Still works fine......
Just last Friday I took the guage for my 52 Panel over to the "guage man" and he calibrated it for 60 lbs in about 10 minutes. I had put a 60 lb decal/reface on it and he said it should be fine! Just info....


1937 Chevy Pickup
In the Gallery
1952 Chevy Panel
In the Gallery
More photos
1950 Chevy Coupe
Pictures!

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile