Good looking project you have there to play with and it should keep you busy for a good spell.
There is nothing wrong with having a Holden motor in your Landy, and a 186 in good nick is one of the best, but a pair of 3.54 diff centres
from a Range Rover will make a big improvement. By the look of it you have a Johnson conversion kit, as the engine mounts look identical
to the ones I have on a couple of vehicles here.
Johnson conversions are one of the best and didn't appear to have any alignment issues, so don't be too fussed about that. Just make sure a
all the mating surfaces are clean and even. If there are any burrs or lumps from being knocked or damaged just file them off. I have done
thousands of kilometers with them and not had any gearbox issues.
At the top of the Holden Powered Series Land Rovers page there is a link to an information booklet that was supplied with a Johnson Conversion.
The adaptor plate should be a cast iron one like the one fitted to the engine I posted a pic of, and the flywheel should be a purpose made
item almost identical to a standard Holden red motor flywheel (weight 11kg), but about 8mm larger in diameter, and drilled to accept the standard Land
Rover 9.5 inch diaphragm clutch, as used on the Series 3's.
The only mod I would do is get a mate with a lathe, or local engineering shop to turn you up a bush to fit in the centre of the flywheel to take
the spigot bush. This way the whole length of the end of the gearbox main shaft runs in the bush, rather than just a 5-6 mm of it, as when the
bush is fitted into the rear of the crankshaft. The first two pics I have posted is of a flywheel with the modification to accept the spigot bush in the flywheel.
While you have the flywheel out I would remove the ring gear and replace it in the reverse, and in a different position (rotate it 60 degrees).
Ring gear can be easily removed and refitted with a gas BBQ/oven.
The flywheel may need surfacing too if it's done a lot of work.
Cheers, Mick.
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