Last week I built a trans tunnel to go from the back of the lenco past the rear panel. Did not want to use the kits you can buy from chassis builders as they are to thin and open on the bottom side. I wanted something really strong as with dropping the clutch at 6K may or may not cause some carnage and the yoke and output shaft are about 6" from my fat ***.
Found some .092 alloy steel 6" pipe and built my own removable containment tunnel.