My fleet is 90% Ford, 10% GM.
I've had little problems with either, but I don't have anything older than a 1997.
Those old Ford 6 cylinders are cheap to repair and last forever. The same could be said for the GM 350 V8.
Have a mechanic check it out, if it's solid, and you don't plan on hauling massive amounts of weight, buy it.
If you worry about load capabilities, I would recommend stepping up to a 3/4 ton.
STAY AWAY FROM DODGE!
I would also avoid the imports, unless they are newer models.