I've never heard of a difference between the deck and the hatch - only thing with seats I know of is on the later models with the three 3 point rear seat belts where the mounting points are different to ones with just the lap belt.
Sorry for the delay.
took the car to a classic car show for a laugh! It was actually good fun.
Then the mods started!
Lowered on Eibach springs, exhaust is a fox I think and wheels are Rota Grids.