He's not under the hockey records for most assists in a game but Himmelright in 1977 and Roche in 2000 are the only ones listed that had 6 assists and a defensemen.
Milton "Prince" Johnson had 6 points in a period in 1950 it doesn't say if any were goals or assists.
GDPritch that game against the Bison was a 17-6 win.