So I've been wondering what all do I need to do a swap to a 5spd dual range transmission on my hatch? Am I gonna need a new clutch as well as a different flywheel and driveline? 4 SPD 4hi transmission is starting to limit my off-road game.

It depends on what you find - 8" or 9" clutch dia and matching flywheel. I found 8" behind my 4 speed hi/lo 4WD box on my EA81, and was able to keep the flywheel and pressure plate and had to purchase a clutch disc to match the splines of the late 86 make date EA82 L Series 4WD hi lo 5 speed.

 

Here in Australia we had a thing sold as GM Holden Gemini in mid 70's made by Isuzu - a 1600cc 4 pot rear wheel drive in petrol or diesel. The petrols clutch disc was perfect for the job.

I also modified the pedal box to retain EA81 pedal to connect to EA82 clutch cable, grind off the EA81 bracket. If you can make EA82 clutch pedal work you may get correct throw. Need to change tail shaft as well. Get a custom one piece or make up flat bar brackets to take the centre bearing tailshaft from an EA82