Is this a mistake?

[Chad Rhodes]

Originally Posted by Adger Smith

The IRS Vettes are allowed the solid rear housing, but it has to meet the specs on flange width and on the mounting points of the IRS swing arms. The cross spring even had to be mounted in a position close to stock. Shock location and mounting points were supposed to be in or near stock location. It was that way at one time. How do I know? I started jumping through all the hoops to build one in very legal form. (2001)
Who is to say what it is like now.

I'm thinking a precedent has been set. It's also been set with the use of TH400 and glides in non GM vehicles and a 9" ford rear in a copo. The doors are open.