I don't check this board as often as I should.
Wee bit of information.
Your Samuel had a brother James who also moved to Scotland with his wife, Eliza Morton. Luckily James married in Tullydrum, Dungiven, Newtownlimavady, County Londonderry in 1868 father, Daniel, a Blacksmith wasn't recorded as deceased, but there are no deaths of a Daniel McCurdy between 1868 and 1875 when Samuel's father in recorded as deceased on the marriage certificate.
There IS, however, an 1867 death of a 72 year old Daniel in Newtownlimavady.
I did a search for Letitia McCurdy's deaths, only two are listed, One for 1876 aged 56 in Coleraine, Londonderry. The other was in Dungannon, County Tyrone a 96 year old, I did a bit of digging and she was married to an Alexander McCurdy, the death was reported by her son, Thomas George McCurdy. So I think you've found out the location.
James and Eliza/Elizabeth had two children in Newtownlimavady, Robert in 1870 and Mary in 1871. They, too, moved to Falkirk where James was born in 1872 before heading to Cathcart Lanarkshire where Jane was born in 1876.