I'm looking at S10's because I have to replace my Daily driver/shop truck and I have owned two of them before,but none with the 2.2 engine.I am finding tons of them with 2.2 engines in them.Although the gas mileage is temping,I doubt they would have the power to tow my trailers the rare times I am having work done on them.What I am looking for is a RWD 4.3 and I am thinking because the S10's are that much lighter than Astro vans I should see a increase in gas mileage over the Astro vans and a S10 engine would be much easier to work on.

Because I didn't see until now replies to this thread I did a search on my own,From Engine Builder - Serving Professional Engine Builders and Rebuilders with information on rebuilt engines, engine parts and performance engines

I found the following.Really small percentages,but a common problem.

HEAD DAMAGE
The aluminum heads for the 2.2L engine hold up pretty good, but about 10% to 15% will need to be pinned or welded because of cracks between the seats.

Another 5% will have severe erosion in the chambers that was caused by detonation. This damage can’t be repaired because the structure of the metal has been altered by the excessive combustion temperatures.

Even if I am not going to end up with a 2.2,maybe in a search here someone will find the above useful.