I agree with Matt on this (and I'm a BIG fan of IRS). We did a 2nd gen Camaro here at the school awhile back. Full 2X3 frame recessed and welded into the floor, relocated upper control arms, and a complete Nissan 350 multilink IRS.
Track width wasn't really an issue with the Nissan setup, but getting the ride height down to 6" took a lot of cutting. Ditching the cradle might have helped, but would have meant a lot more setup and fabrication for all the mounts.
I've followed Teetoe's build, and they obviously started out with a gutted shell. Either way, it's not easy. Or cheap...
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Ray Kaufman-Wyotech chassis fab instructor
Custom suspension design and consultation.
(Now 2) Big Block asphalt supermodified ('cause too much is never enough...)
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