Depends on the horsepower you will put in front of it. I just removed a C4 rear end from our 71 Barracuda because it just wouldn't hold up the 700 plus hp in front of it. The fit was good though
I had two c4 IRS's on the shelf for the same expected upgrade, but reality set in all I would have is an old outdated vette IRS, that still would not handle the power. They got sold.
Today on the shelf is a Cad CTS V IRS, that If I proceed, will get the center changed out for something beefier. Does that make sense, only to me.
