I have the Patrick Motorsports -6 bar. It is truly a nice piece, and it doesn't hang low in the center at all.
www.patrickmotorsports.com
I am pretty sure I have a 901 gear box, and it takes everything I throw at it.
Everything I have heard/seen, you need a front oil cooler. If you wanted to get into it it, you could make a 944 turbo intercooler an oil cooler, I have seen that before.
If you want A/C, you are going to have to notch the firewall in, so hopefully you aren't tall, because it will require you to move you drivers seat forward a little.
Feel free to email me with any questions or pictures or whatever. I have a digital camera, so I should get back to you within 12 hours of your question with pictures if needed. I can find an answer to most questions if I don't know it already also.
I will be out of town until Sunday night though.
- Brett Smith
brett@craincorporated.com