The Fiat was built by Gary Hastings a nice guy and very clever fella. He was involved with the original build and maintenance of Mr Huxfords Capri, they were very good mates. Garys car was a Fiat 850 shell with the front built into a kind of mono with adjustable a-arm suspension, a smart bit of fabrication. the rear was basically a space frame with a Rover V8 mounted across the back east west sitting on a (don't laugh) Tasman gearbox which was all run through chains from engine to gearbox. the rear was also adjustable a-arms. It went alright. got out of corners well. Had a couple of laps in practice at Bay Park one day and it was impressive. If you went in hard it would have a little understeer, but once used to it you could use that to get a good straight exit on to straight. Use the right foot with brain, I did adjust.
Last talked to Gary about 15 years ago he had a Rover 3.5 original and was doing engineering in Kerikeri, but then moved on and i lost contact (shame)