Too late, it's off the trailer now.
Started having a look at what I had apart from rust on frame and frosty alloy. Pulled the plugs and tried to turn motor over by pushing it in gear. It's locked. It shifts through the gears ok. Using jumper leads I connected a battery pack. Turned ignition on and got nothing. Managed to get right blinkers going and after a bit the left starts working. Neutral light is now working. Brake light is working off front and rear levers. Horn u/s, broken wire. Headlight flasher works but otherwise, no headlight, or taillight. Tried starter switch and it seems to engage the starter but wont crank. Looked at the plugs and #2 seems to have a touch of corrosion forming so I guess that may be the piston which is locked up (unless its more than one). Injected about 50ml of ATF/Acetone mix into each cylinder, put plugs back in and put it to bed. BTW looks like its done 111,870klm, not a lot for an FJ.