When using a PVS-14 behind an Aimpoint, it is not necessary to be perfectly-aligned behind the primary optic. I've had great success firing at night, using an Aimpoint with a head-mounted PVS-14. Works great (even though the cheek-weld is a bit tricky).
That being said, our selection of PVS-14 QD mounts are specific to Aimpoint M-2's, M-4's and Eotechs riding on standard-height mounts. We do not have a PVS-14 mount that lines-up perfectly with the centerline of a T-1 in an LT660.
The LT660 (Tall ) mount puts the centerline of the optic 1.64" over the rail.
- LT114 (High mount) is 1.77" ( .130" higher)
- LT133 (Low mount) is 1.27" ( .370" lower)
- LT755-14 (pivot mount) is 1.725" ( .085" higher)
Therefore, the LT755-14 would get you closest to the centerline of the T1 on an LT660.