That rear mount can be a bitch. I had a set of ES bushing inserts on my hatch and we couldn't get the rear mount to drop over them without pushing them out of the mount so I had to remove that T mount and install it after the motor was lowered down in. That was extremely tight and a big pain in the ass. I just soaked the sucker in grease when I did it the second time and it seemed to go easier.

The wiring should be alright, but you could always use a couple of zip ties to tie everything into place. I would assume grounding the VTEC and IAB to the chassis should be sufficent.

I just purchased a GS-R cable for my EG swap, I think it was less than $50. I could have probably made the CX cable work (it was extremely long) but I decided to spend the money. Aside from being a bitch to get it attached to the TB sometimes, it worked fine.

I forgot the non-VTEC cars could just attach the exhaust manifold directly. I used an extended GS-R cat on my '92 CX/B18C1 and it worked well. I tried a custom test pipe for about a week but it changed the exhaust tone from deep and nice to higher pitched and whinny. I put the cat back on, they're pretty efficent as far as flow. I had a Tanabe Racing Medalion exhaust I bought used for my hatch, loud but fun. Good luck getting it started, hopefully you don't have any major problems!