Really really cool so far. Any updates? I'd bet you can cut/weld those manifolds if you want to put more of a universal style flange or V-band on them or make them fit fit better, I do it all the time on the OEM LS manifolds. They look perfect to flip forwards for a forward facing turbo...
Do you have 40" between the cage posts so you can lay the spare on it's side? I could feel a noticeable difference in handling with the spare flat and right behind the front seats (back seats removed). And that was only a 35" tire. More weight towards the center obviously.