I am using the GSR mounts for the two in the front, 2 Si (or SiR for Canada) mounts for the rear tranny and driver side top mount and I'm using my Civic top tranny mount. Everything fits perfect, but I have to admit the rear tranny mount was near impossible to install. Took me at least 45 minutes to get the bolt through.
For the wiring harness, besides the alternator connector the others are fine. Well, I had to modify some of them, like the KS, IAB, VTEC solenoid, VTEC pressure, etc. The one thing I'm worried about is that the wiring harness isn't really supported by anything in the back of the engine (where it passes underneath the intake manifold). It's in place and can't really move, but it's not really held in at any point. Also, I connected the grounds for the VTEC pressure sensor and IAB to the chassis of the car. I hope that's ok. I couldn't locate the appropriate ground wire in the wiring harness.
Now I'm trying to modify my current throttle cable, because I don't want to spend more money on a GSR one. I've already spent so much. Monicle has a photo gallery explaining what to do, hope that works.
For my exhaust, for now I'll temporarily run it off of my Civic exhaust w/o cat...I know I know, it'll be really loud. But I'll make an appointment for Monday or Tuesday to get a custom 2 1/4" piping done.
Wish me luck.