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If your worried about bottoming out your shocks, which I don't think they should, why not get some spring spacers. They are cheap, and will be fine until you can get some coin for lifted springs.

Not at all

I think he's taking about getting 2" shocks but running the stock coils till he has the coin to replace them and get new body mounts

I don't see it being an issue but if you can flex it up and...

When I fitted my 2 inch lift, the shockies I removed, were the exact same part number as what I was putting in with the lifted springs, never had a problem and I did heaps of off-road like this.

For what you want there is no advantage going bigger & doing so will only increase your fuel consumption.

Did a similar trip a few years back now on 31" BFG ats had no problems at all.
Now I would do the same trip using a 285 x 16" tyre.