If you find a running /driving 1st gen with the 22RE and manual trans, it will probably keep running and driving as long as you feel up to doing the maintenance. Parts are cheap and plentiful, easy to work on, and if you have questions there is probably a thread here about it already. My '89 has 436,000 miles on it now and is my daily driver. The 3.0 (3.slow) is known for blowing head gaskets and really doesnt seem to be any better for power than the 22RE. You can swap almost any motor into a first gen without massive fabrications, and as long as it hasnt been beat on and had the mounts tweaked, the IFS is a great setup for most things with a little modification. 1st gens are also known for rear spring sag. Search Zuk mod for a budget repair. Rodger Browns website has a write up with pics for almost every known problem. read through there before really looking at 4runners and you will be armed with serious knowledge on what a 4runner will need to have done when you buy it. Good luck and happy hunting!