....first off I think your 57 is probably different than my 52 panel guage...but, IF they are the same the fittijng you are looking for is called a threaded fitting. It just slips up over the line and screws into the back of the guage. No o-rings or compression fittings....don't ask me how I know!!!

Yours may be different but "maybe" it isn't and this will help.


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