TRclassic3 came to the rescue yesterday. After he mowed my lawn, we started the TR3 for the first time since fall. Didn't back it out of The Lab, but got it up to operating temperature. He started instantly and we found no problems, so I will be able to attend British Car Day on Sunday, June 6, which will just make the deadline for driving during British Car Week.
The TR3 might be dirty, but I'll be there. If TRclassic3 gets some time, he might even clean the TR3 before the show, but I'm happy just to be able to attend.
Even I, a sarcastic, jaded old curmudgeon, am touched by the helpful kindness TRclassic3 has shown toward me.