5th gen IRS into 2nd gen

[70rs]

I wish I knew where to direct you for that specific info.
If you want a 5th gen IRS get in touch with Gus at Cleveland Pick a Part. (sponsor here in the parts for sale section often.) I am sure he can set you up with a complete unit. Maybe some specs too?
If you decide to go with an aftermarket unit, Randy for the Heidts unit or The Roadster Shop also has a unit called "fast track IRS". Its a complete system including custom frame rails for your application.
Both are very nice systems. But the Heidts is the only true bolt in that I know of.