So, I have a 2wd 2.7L auto '99 ultra-base model... based on the Toyota Options page elsewhere on this site I think I have the base model w/ Upgrade Value Package #1.

I want 4wd.

My wife and I love this rig (can I call it that, even though it's only 2wd?) and we don't want to trade it. I'd like to swap parts from a wrecked Taco or 4Runner of similar vintage; ideally I'd like V6/4x4/5-spd, but the 4x4 is the most important.

I know this is a massive amount of work, and I won't be undertaking it anytime soon (say, a year or two off) but if it's going to be possible, I'd like to start collecting parts.

So, finally, my question: what am I going to need from the 4wd donor vehicle that's not common to 2wd? Obviously I'll need everything between the front wheels and the t-case... do I need to replace the tranny, or can I bolt up the t-case to my existing trans? Then I'll need the donor rear drive shaft... How about the suspension? Sounds like the 4wd springs are different, so I'd get those from the donor (or consider *small* lift at that point)... nice bonuses would be the electric locking rear, etc, but if they're not there I wouldn't cry.

I know that this project will be quite extensive and maybe not very cost-effective (vs. trading) but it'll be more fun and I'll get to know my rig VERY well... I have done some wrenching in my past (including restoring/upgrading my '68 Merc Cougar), but this will be my most extensive project to-date.

Thanks for your help and opinions!