I've  installed  the ISG panels with my CS-C-130X.  Replaced the TCAS with an EHSI, added the CMU, FMS, GNSXLS.  I have the saitek mulitpanel, comm panel and switch panels so I changed the autothrottle-1 for autothrottle control.    One of the things i found helpful was to put the vnav switch and mount it directly on the ISG-CMU in an open spot for vnav/lnav function.   As close to the J model as we can get at the moment with this older style instrument panel.