Has anyone had experience searching for the following church? The LDS Library has film for 1881-1912 when it was the Second Presby. Are there records available for the 1850+ time frame?

Below is what the FamilySearch.com website has to say about this church:

Church was organized in 1837 as First Associate Presbyterian Church of Allegheny; in 1858 it became a United Presbyterian Church and in 1877 it became Allegheny Second United Presbyterian Church located on Stockton Ave., North Side, Pittsburgh. In 1909 the Allegheny 9th United Presbyterian Church merged with the Second, in 1930 the Allegheny 10th United Presbyterian Church merged with it, and in 1943 the Allegheny 5th merged with it, this time to become the Allegheny 2nd-5th United Presbyterian Church and located on Brighton Rd, North Side, Pittsburgh. In 1963 the name was changed to Faith United Presbyterian Church. In 1971 Faith merged with Melrose United Presbyterian Church to become the Pleasant Valley Community United Presbyterian Church which in 1980 was disorganized.