Depends on how good your system is!!!! I only run a 4lb but my radiator has a new core but the ORIGINAL thin top and bottom tanks!
I'd say a 14lb should be gosh plenty! If I remember correctly every lb of cap pressure raises the boiling point 12 degrees BUT DON"T QUOTE ME ON THAT.


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