Originally Posted by YellowRose
In doing some calling around to the NOS and Obsolete places in our Ad Forum, I found this out, and told Scott. The B8A-8100-A is a 13lb zinc radiator cap. The one that I did find is not a NOS unit, but a Repro. There is a C1UU-8100-A which is a 13lb Lever Pressure Release radiator cap and a Chrome version, the C2SZ-8100-A (if you can find one without it costing you an arm and a leg). So there ya go, you other Littlebird owners, in case you ever have to look for one.
The one problem with the lever release cap is that if one forgets to push the lever down and closes the hood there is going to be a "nice" little uh-oh in the front of the hood.