Regearing is a BIG job. Special equipment needed (press, calipers, micrometer, etc...) Take it from me, it is not a job that you want to do yourself if you don't have experience setting up gears. If you don't do it right, it will cost you big in the long run and could fail at the worst time, ie at 75mph on a crowded highway. Trust me, I've been there.... not cool. If you don't plan to do any real offroading then a D35 out of a 4banger is not a bad idea and I would think that you could pick one up pretty cheap.
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