Some of you will know my scooby ru's story, some will not. So I have a beautiful '78 brumby. Some years ago (roughly

I had the motor done roughly 2 years ago fully rebuilt. Mechanically he is in tip top condition, I will need a distributor at some stage in the future but that is about it.
Interior is.. average. Somehow during all of his restoration no one bothered to connect the hoses under the dash so he has no heater. The door trims are both cracking and splitting in various places.
I do love him very much and drive him almost everyday (except when it's way too cold) and I DID have plans to eventually sand back little spots of his exterior, remove rust and respray. I was also going to get the heater hoses re connected and find/have made new door trims.
I have recently been having second thoughts. I do not plan or expect to ever make money on his sale although I am un sure if he is actually worth anything to anyone. I have personally never seen another 78 on the road and the guy at volksbaru, where he gets his mechanics done said that people often stop at his shop to look at it. He also said he has never seen one in as good a condition as mine.
Here is my second thoughts issue though recently discovered. It has been raining A LOT around me and scooby lately and I have begun to notice LEAKING into the interior. One leaking spot is somewhere? near the passenger side floor and the other leaking spot is in the wall behind the drivers seat where the water comes in and the pools underneath the drivers seat.
He is just beginning to appear as a WAY too costly and time consuming exercise to restore.
I have been told the little paint bubbles around the roof may be much deeper rust spots than I am expecting however obviously I have not started to do any of the sanding I was planning yet, so I don't know.
I DONT KNOW WHAT TO DO.
Should I spend the money and time and continue the life of my little vintage car or let him go to heaven.
I have another vehicle, I dont NEED him as such but I do love him. I DONT KNOW!!! Any help, advice or comments would be greatly appreciated.
Cheers,
Carlie