I remember trying the SimuFly Delco Carousel IV-A INS gauge v1.60 x64 with the 1011 Captain II, but I couldn't get it to work.

It's possible that I messed up the instructions for using it (entering the gauges info) in the panel.cfg, but I did more or less skim through the instructions, which seemed very similar to the v150 x86 version for FSX. Seeing as it wasn't a case of "must have" for the L-1011 II, I decided not  to bother with it anymore.