I installed my CXracing intercooler in my OBS this weekend. The install took about 6 hrs. It fit fairly well and the only custom piece I had to make was the lower mounts. Just had to use some gas pipe and longer bolts to extend them.
There was no directions with the kit and they never got back to me when I emailed for them. Anyways, you can figure it out.
You don't have to cut the actual core support. The parts that need cut are the rad mounts. The 'L' shaped brackets that bolt to the rad and the support.
I had to relocate my tranny cooler b/c it was aftermarket and much larger and in the way of the IC.
I included a couple pics of my new gauges and exhaust I installed a few weeks ago. Gauges are Isspro EV2s.
I have 6.0 IC and 7.3 super duty spider if anyone may be interested. I don't know if its an early 99 or late though. I'm not sure how to tell and haven't looked into it yet.
I'd recommend the CX racing kit, has everything you need. I really didn't want to piece together my own kit b/c free time is limited and I bet I would have about the same amount of money into it afterwards anyways.
I'm noticing an average of about 100F drop in EGTs throughout the rpm range. Pulling hills in OD I think there's about a 200F drop from where it was before (no data logging, just memory of the EGT gauge).