Update
After blowing the dust off the ute and finally getting time in the garage the rotary is now sitting in the engine bay and not on the stand.
I have mated the s2 rx7 Bellhousing to the standard courier gearbox with a few cuts and alot of cursing, now i just need to get my argon refilled and decide how I'm going to mount it in there.
Photos
Courier bellhousing
Rx7 S2 bellhousing
Courier Box
Rx7 S2 Box
Rx Courier