I pulled the nail out this morning.
It was 2in long.
I called 3 different shops.
They said they would plug it.
I have faith in 2 out of the 3 shops I called.
I plugged it with out removing the tire.
I put 90 miles on it since.
It seems fine.
I am still a little nervous about it,but I think I will leave it alone for a while.
I bought a emergency tire repair kit today.
If it was a front tire there would be no question,I would buy a new tire.
Had a front tire go on me about 30 yrs ago on a BSA.
I almost lost it.
Thanks for all the replies.
I will keep you posted.