The Pro-164 does accept the proper spacing for narrow band frequencies but you haven't got the ability to select narrow band FM, so much easier that way.
Clyde, N1BHH, A Know Code Amateur Radio Operator, since 1970
WQLF416 = GMRS
Pro's 94, 106, 164, 197 (2), 2006, 2015, 2021, 2055
Yaesu FT-60R, 2900R, 8000R & 8800R, Motorola MTX9250, Icom IC-735