Ok guys, I am going to look at an 89 4Runner, what should the main things be that I look out for. I know I will ask to see the receipt on who rebuilt the motor.

Here is a little info about the truck and a picture.
1989 Toyota 4 Runner Deluxe 22RE with less than 30 miles on professionally rebuilt engine. Body very good with 2 inch lift. 456 gear ratio, American Racing rims with new BFG KOs 32/1050. Manual windows and doors, top never leaked, air conditioner is very cold, Wet Okole front seat covers. Really great all-purpose, hunting, or off-road vehicle.