you mean the connection point dimensions on the cobra irs? they use the same mounts in the front as the lower control arms on the SRA. The rears connect right under the quad shock and use a cantilever bracket. (I have pictures in my build thread, in my sig if interested)
The cobra IRS isn't that much, look around on ebay for a used one. or on svtperformance.com, sometimes people are willing to trade straight up for a SRA. I got my 99 cobra IRS for 600 dollars.
Also the SRA is fine in drift applications once you upgrade from the stock 4 link to a torque arm/panhard bar set up. Those upper control arms are terrible for anything and everything IMO.
IMO your best bet is to keep your SRA, add the panhard bar, torque arm put some very stiff springs in the back, remove the front torsion bar and decent struts and shocks in all corners and you'll have a decent drift car as long as you have the power to hold a drift that is...
good luck.
