Txstang347 Thank you for the kind words.
1. What couplers/fittings did you use to connect the IRS softlines to the Fox hard brake lines?
I still havn't gotten the car on the road yet... been broke and havn't found much time lately but to answer your question, I cut the stock hardline right at the end of the tunnel and put a double flare T on the end. From there I used a double flare on the T end and a bubble flare on the other end to connect to the stock cobra soft lines. I found the cheapest place to get the T was from ebay. Just make sure that all sides on the T fitting are double flared and you should be set. A lot of the fittings i found only had the inlet a double flare...
2. What are the exact parts I need to mate the Fox driveshaft to the IRS pumpkin. (My IRS came without a flange) How would it work if I tried to hook up the fox drive shaft straight to the the IRS? Why is that not a good idea?
You can pull the stock flange from your current 8.8 and slap it on the cobra pumpkin. Several people have done that just to save cost and time instead of looking endlessly for the correct flange to turn up. From 99-01 the stock driveshaft will just bolt up but 03/04 the flange is much larger is the only reason. My IRS came with the cobra flange still on the pumpkin so decided to to get the flange off a cobra driveshaft and use a precision 448( i believe) adapter flange. It adapts a 1330 to a 1350 i think. I needed a new ujoint anyways.
3. Is there any fabricating, cutting, or welding that needs to be done (besides the exhaust)?
The whole thing is pretty much drill and bolt in. You don't need to weld anything. Some I have seen weld the rear mounting brackets to the frame rail but that is a personal choice. I don't think its necessary. There is a far bit of cutting or banging in my case to get the rubber bumstops off the framerails right above the axle housing. I used my grinder to cut whatever I could and pulled out a 5 lbs hammer and chisel and knocked off the spot welds. Wear goggles when doing this... It may not seem dirty but all sorts of junk comes falling down... not to mention that you are flailing a large hammer against metal.
4. Did you have to bend or re-flare the Fox hardlines to work with the IRS?
You pretty much toss everything after the tunnel. I followed what these guys did for the most part.
IRS INTO FOX BODY
It looks like they cut further down the trans tunnel and made an extension... I didn't do that and just cut the line right after the tunnel.
Good luck to ya.
Snakebite01. For the rear springs you will have to use cobra IRS springs. The fox springs taper down at the bottom to sit on the mount. The cobra springs are the same size top to bottom. I used the H&R race springs. My IRS didn't come with springs... well it came with the front cobra springs but not the rear... hehe oops. I consulted Maximum Motorsports and that is what they suggested to go along with my 300 lbs front coilover kit... which has yet to install itself. If you do use the stock rear cobra springs, you may have to cut them because they were made for a much heavier car.
For the front, I would use the fox springs. The stock cobra springs are 600lbs springs I believe so it is a bit much. MM will sell just the rears if you need them. I think it costed me about 150 for mine... Unextected expense but its a hobby. Depending on what front springs you have already, I would give them a call and see what they suggest to balance out the rear.
Kevin
no matter what you do to them IRS's they will always get wheel hop if you launch them hard. i would only consider putting it in my car if it's a DD and want the ride quality. which is exactly what i'm looking for 
