F150 HD Payload and Max Trailer - How to spot them?

IdaD wrote:
The HD payload F150 is a rare thing unless you order one new. Good luck on your quest, but you might need to shift gears to an F2/350 instead if you need more truck than a regular F150.

Thanks. The HD payload is not a huge issue, as our current rig has 2,000 and we do just fine. I’d be more concerned with the max tow, and it seems hard to figure out which trucks have that in online listings.