Re: F series pickup
Are you in US or Aus? I'm assuming US by the pickup term. I don't know that much about F-series but 360ci V8 is a Mopar motor, you are more likely to find a 351 Windsor. I don't think there would be that much difference in how hard they are to work on but some of the older models are real primitive in the suspension, etc.
Leaving aside the motor/power requirement (judge by what is satisfactory when driving, or ignore 6 cyls, etc) you are better off by buying on condition rather than one particular model over another when getting into vehicles that old. The most important thing is whether they have been looked after - rust, any big mechanical jobs coming up, etc.