you can get 1.5" 66`s, i`ve got them on my glory and i`ve got a spare brand spanking pair of manitou shermans with 6" travel and they are also 1.5".
i thought a glory had a 1.5 on the bottom and a 1.1/8 on the top, and i've never seen a pair of 66's with 1.5 headtube, i may be wrong though