If You Are Considering This Swap
Having worked on this swap for a little while now, I will make a statement for others considering it. I do not imagine there is going to be many Z-cars looking to make this swap. A high HP V8 Z that does not drag race or even a high-HP L28 turbo that does drag race does not need this. The Nissan R-200 or R-230 with CV axles will do the job. If you still have a desire to do it but also want to retain the stock fenders, my advice is to not consider this swap. The unit, even when narrowed, is still too wide for a stock-fendered Z and I would not advise narrowing it any more. If you plan to use flares wider than mine, then you are in luck. Nothing would have to be modified. What this means is you save the cost for all the modifications I did. The only thing you would need to do is fabricate a mount for the top of the shocks (left in the original location). The original hangers I designed could be used without interference and the links would be a little more to the center of the fenderwell requiring very little cutting, but a well-braced mount point would still be required.
If you just absolutely have to do this swap and you have or plan to get fender flares, then heed this warning. These Corvette IRS can be expensive. I previously stated this was the least expensive alternative for me because I got the IRS at a good price and sold my entire Nissan IRS to help fund the projects. If you are mechanically-challenged, do not have some fabrication skills and cannot weld or have access to a good low-cost welding, then this could be a very expensive swap over and above the cost of the unit. I feel confident that this document will be a good guideline but I have no intentions of providing any specifications for the cutting that I did and brackets that I made. Since this swap was never done before (at least the way I am doing it), I am "making it up" as I go along and I am amazed to find minor differences as I fabricate things from one side of the car to the other. Considering this and the differences between the model years, there is no way I could confidently give specifications from my swap and be assured it will fit all.
