Stage 1 is Standard Series 3 aft of the firewall except for the Diff ratio and gearbox/transfer case/handbrake, which are Rangerover (LT95). Forward of the firewall they are basically Series 3 except for the engine, but with Defender bonnet and front panel, and numerous other changes. Most importantly, the front axle is specific to the Stage 1, although it uses standard hubs, six cylinder brakes and Rangerover diff. Note that late Series 3, including Stage 1, have different stub axles and wheel bearings.
There are also a number of minor differences in equipment levels, typically having as standard bits that are optional on other models.
The only bits that seem to be hard to find are front axle parts. (Maybe a few other bits that would only interest rivet counters)
John
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
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