Thought that Ford was working on a solid 9" rear for their Cobra Jet. That link showing the Driveshaft Shop IRS pro-type sure looks to be a 9" with the removable center section and strong enough for anything.
2015 Stage 3 Roush
'66' Ranchero w/almost done 302 T-5 swap
2000 4x4 Ranger
2003 4x2 Ranger
'69' Fairlane Cobra, 428 4-speed waiting for work