Dear Lynn,
I may be wrong but I read the information about his death in 1963 this way:
Burial on July 8 1763.
Died when he was 49 years, 4 months and 7 days old.
Assuming that the age refers to the age at his death and not the date of the burial AND assuming that the burial in Summertime was no later that one week after his death, he must be born ultimo Feb. 1714.
Unfortunately the church books for Hundborg/Jannerup doesn't seem to cover this period.
Best
Lis