Sorry, I didn't know your father, but I have information on the 667th FA BN which may be of interest to you and to your family.
The battalion was activated at Camp Bowie, TX, 21 Feb 44; following training, it departed Boston P/E, 10 Nov 44; (probably on the NEW AMSTERDAM, sailing alone, with a compliment of over 8,000 troops) arrived Scotland, 17/18 Nov 44; arrived France-ETO, 31 Dec 44 (just in time for action at the Battle of the Bulge); arrived NY P/E, 28 Jan 46; (no ID for ship arriving that date) inactivated at Camp Kilmer, NJ, 29 Jan 46.
25. Ardennes-Alsace, 16 Dec 44 / 24 Jan 45 (Bulge) 26. Central Europe, 22 Mar 45 / 11 May 46 34. Rhineland, 15 Sep 45 / 11 May 46.
His was a non-divisional battalion, which means that it was attached to various senior elements on an as-need-where-needed basis. His gun was the 155mm (Long Tom) tractor- drawn howitzer.
I have no information as to casualties.
I was Chief of Section, 985th FA BN, Fifth Army, Italy, at the same time. Mine was the Long Tom also.
I came back thru NY P/E and routed thru Camp Kilmer just over a month after his return.
Please let me know if this conforms to your profile for your dad. OK ?