Actually Series 3 has synchromesh on all gears, 2a (and 1,2) only on third and fourth, but the gearbox is generally considered more robust. A change in the clutch release mechanism means that the gearboxes can only be swapped as a unit with the clutch and bell housing.
Note that the lwb (both 3 and 2a) came with a six cylinder engine as an option - this is set further back than the four, leading to differences in the firewall, prop shafts, floor panels etc - so you might find find differences depending on what engine was there before the Holden in each example. The sixes also have wider front brakes (fitted to all models in late production Series 3, can be fitted to any Series Landrovers with advantage).
Another difference between the 3 and 2a in the long wheelbase (lwb) is that unlike the 2a lwb they have a much more robust Salisbury rear diff.
John


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. I came in later and he'd removed the Disco bit... or I'd have done the same!
Either way, he'll end up with two Land Rovers in his yard!!! Straight into it I say!!!

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