They appear to have lived in Gt Wenham - found these entries on Suffolk Burial Index - of course it may not be the parish in which they married but it is very close to Higham:
Francis STOW buried 8 Dec 1749 Gt Wenham, St John
Bridgett STOW, daug of Francis & Bridgett, 27 Jun 1752 Gt Wenham, St John.
These are the only 2 STOW(E) burials recorded on the SBI in Gt Wenham
Bridgett STOW (noted as wife of Francis) was buried 30 Jan 1774 Stoke by Nayland, St Mary.
Apart from Higham & Wenham there is also a Layham close by & just over the border in Essex there is Dedham & Langham.
There are STOWs in Raydon, also close by - Francis STOW buried 20 Aug 1714 Raydon, St Mary and an overwhelming number of burials in Polstead going back to 1662 including a Francis STOW in 1669, another in 1684 etc.
K