Welcome and congrats, what a great find!
Regarding the clutch master cyl. leak - since it has been sitting I would recommend replacing the clutch slave and master. I have owned 60's for many years and the only time I have been stranded in one is when the hydraulic clutch system failed. It is relatively easy and inexpensive to replace and bleed the whole system, and well worth it for the peace of mind. There are several great vendors on this website who can hook you up with the correct OEM quality (AISIN) parts for your build date.
Regarding the clutch master cyl. leak - since it has been sitting I would recommend replacing the clutch slave and master. I have owned 60's for many years and the only time I have been stranded in one is when the hydraulic clutch system failed. It is relatively easy and inexpensive to replace and bleed the whole system, and well worth it for the peace of mind. There are several great vendors on this website who can hook you up with the correct OEM quality (AISIN) parts for your build date.