FedEx showed up earlier than normal today. I had already filled everything with coolant and bled what I could. Here’s a comparison of the old and new radiator caps, old one on the right:
You can see the groove in the blue gasket, if you squint hard you might see the groove in the black gasket. That was obviously enough to allow leakage. Put the new one in place and then went for a quick shakedown cruise. Everything looked good.
As promised I took another distance shot to better show the fitment of the bikini top with my little modification:
It lays a little flatter front to rear. I would have to compare to another top to see how tight one is that was made for a specific car but I don’t have any flapping so I figure it’s good.