It would appear from this will that Peter was a member of the Scotch Plains Baptist Church.
1764, Feb. 24 Willcock, Peter, Jr., of Borough of Elizabeth, Essex Co., yeoman; will of. Sons, David and Noah, my plantation, and it is to be divided by a line running from my brother John's grist mill. Eldest daughter, Bette Willcock, £70. My second daughter, Phebe Willcock, £60. Third daughter, Hannah Willcock, £50 when 18. My 3 youngest daughters Sabra, Joanah and Mary, £50, when 18. To the Baptist Church on Scotch Plains, £20. Wife, Elizabeth, £30. Executors---wife, Elizabeth, and Joseph Allen. Witnesses--- Uriah Daniels, Benjamin Gray, William Willcock. Proved March 6, 1764