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The Kilcullen parish register goes way back but there are some gaps https://registers.nli.ie/parishes/0483 I was able to locate a possible baptismal record for James Galbally in Kilcullen in 1808 on Roots Ireland. I did not find a marriage record and it is possible that the marriage occurred in one of the gap periods. For Catherine Murphy with mother Catherine there are two possible baptismal records in Kilcullen: one in 1806 and the other in 1807.
Other than the online phone book, we don't have any resources for people currently living in Kilcullen. Sound like you have a good lead. Most people left Ireland for a better opportunity. They likely had contacts in Buffalo and that is why they headed there.
Please consier adding your ancestor stories to our XO Chronicles site https://www.irelandxo.com/ireland-xo/history-and-genealogy/ancestor-data...
Have a great trip!
Name:James GalballyDate of Birth:
Date of Baptism:18-Feb-1808Address:UnknownParish/District:KILCULLENGender:MaleCountyCo. Kildare
Father:Duke GalballyMother:Biddy UnknownOccupation:
Sponsor 1 /
Informant 1:Bil Galbally Sponsor 2 /
Informant 2:Mary Flanegan