Hey there Mike, how are ya?
I have seen these manifolds but i personally prefer the runners to be going straight up and down.
Had a nice car at work yesterday, this fella bought a vx commodore that apparently has won some awards recently at car shows, it has a 7 litre gen 3 with twin screw supercharger bolted to the intake and alot of internal workings to the engine.
I think he said it was dynoed at over 750 hp and over 900 ftlb torque, he says he has the dyno sheet that came with it.
this thing had huge AP floating rotors and calipers that i could see through the rims, didnt get to see it from below, he says it is incredible to drive,
gotta love these open speed limits
PS ; I bought an au2 xr8 rear complete subframe with diff, driveshafts, suspension and brakes from a guy on ebay yesterday cost me $1000 so i think i got a fair deal.
I will be going to Sydney for work in june and seeing Ian to order my kit, i will be picking it up in december and trailering it through Melbourne at christmas time so i will give you a call and drop in if you dont mind.