This may not be definitive due to the nature of our lovely beasts, but the below will hopefully grow to a good guide of how to get the body off your Griffith.

Anybody else who has done this please add and modify as you see fit.
Also the below is for my 1992 car.

Maybe even list companies who offer good shotblasting/finishing services for the metal.

Photograph everything you arent 100% sure of.
Bag and mark all fasteners that you remove.
Tag all wiring connections that you are 100% sure of.


DISCONNECT THE BATTERY.

From underneath the car
Fuel Pump/Tank
Disconnect the fuel pump feed pipe coming from the tank by the nearside rear wheel.
Here you can decide whether to drain the tank from below or,insert a 12mm bolt into the pipe and retighten the hose clip.
Disconnect the fuel pump wiring.
Dig out the sealant where this pipe comes through the lower boot body work.

On the offside seperate the copper fuel return pipe from the rubber pipe going back into the lower boot body work.


Working in the boot, remove the carpet to allow access to the tank fixings, two lower and two upper.
Remove these fixings.
Photograph the tank sender connections and disconnect.
Undo the tank filler spout hose and pull the filler cap and neck upwards out of the way.
The tank should now be loose and be willing to be pulled back.
(on a later car there will be pipes going to the carbon cannister, (can someone please update)
Remove the tank from the car.

This will expose the four rear chassis fasterners,two 10mm(17mm spanner) pins and two upper dome head cap screw(6mm allen key).
Remove these.

Exhaust
Undo the exhaust clamp from the Y piece down the main pipe.
Undo the two forward fixing of the main exhaust,1 on the side of the block, 1 on the lower gearbox case.(LT77 box)
Undo the two 6mm nuts at the very rear of the system.
Support the system at the rear of it.
Undo the 6 10mm pins holding the exhaust silencer box to the chassis.
Remove the exhaust pipe.

Undo handbrake tension
Reaching above the diff,wind back the handbrake adjuster as far as possible,this will allow the lifing of the T bone centre console.

Under body wiring
Disconnect the speedo sender at the gearbox(LT77 box,at the diff on later cars)
Disconnect the two bullet connectors for the reverse switch.
Disconnect the starter motor wiring.
Disconnect the Oil pressure sender wire.
Disconnect the Oil pressure switch wire.