IRS for 69 Camaro

[Prosconst]

I'm looking to build a nice handling/riding street car. I dont go to the track but do drive it hard on occasion. I installed Ridetech's tubular control arms and coilovers in the front and now need ideas for the rear. Has anyone installed a IRS on 1st gen caamaros? I was looking at Ford's 8.8 center but dont know how to make everything fit. Is it worth looking into this or should I stick with Ridetech and go with their Airbar with coilovers?