After spending another two hours with hot soapy water, various rounded off old screw drivers, and my Dad's help. I was still not able to get the new moss seal into the channel on the bottom of the windshield frame for the last 4 inches on ether end. I didn't check the dimensions yet with my dial caliper but the channel " has to be " smaller at both ends. Perhaps when it was shaped at the factory, the channel was deformed ? Per T.H. I'll try one from Austin Healey spares.
... T.H.. did you slide yours in from one of the ends ? I couldn't get mine to slide in more than 1/4 " before it became an immovable object. I was able to push it into the channel using a small rounded off screw driver, ( except for the ends ), an 1/8 of an inch at a time. Sliding one in would be worth double the price of the one I have tried.