Ordering 150 for Towing
 

We've done a large number of 150 builds on ford.com - King Ranch and Platinum trims. How is one going to know if the payload is adequate for the task without the yellow door sticker? How much does the moonroof subtract from the payload capacity? Difference in weight of 5.0 V8 vs 3.5L V6? Bed length - 6.5 vs 5.5 feet? All factors in payload capacity.

Well I suppose we would start by identifying the task.
If, like so many on here, you are looking to tow a 8,500 lbs trailer then most likely you wont be able to do that with a KR or Plat. Such a trailer would have over 1,000 lbs tongue weight. Most KR and Plat trucks have less than 1,400 lbs payload. In such a situation I cant see how you could load a typical family, all your crap and still handle that much tongue weight.

If you want that bling and be able to tow a heavy trailer you will want to step up to a Superduty KR or Plat.

This ^^^

There are threads where the weight of options is listed, including the moonroof. But you're not going to tow anything substantial with the top trims as stated, period.

If you insist on the many luxury items and towing get an F250 gas short bed
Or
Get an XLT HDPP short bed and no luxury items resulting the highest GVWR and the highest payload for an F150

normally Id say go to the dealer and look at door stickers, short of that I really dont know... build and price and such dont show it.

isnt there a thread on here somewhere asking people to post their build and door sticker?

This is a 2018 document, still should be relevant. Moonroof subtracts 64#. When I was looking prior to ordering, I got a real good feel what a similar truck I wanted , delete a few options like moonroof, rear step, etc, and I was really close to what my actual payload is when the truck arrived. To say you can do this all online, I doubt it. There used to be a large canadian truck dealer that always posted pictures of the yellow tag with their trucks that also was insightful.

If you are considering towing an RV that you do not own, you have an equal dilemma with the purchase of an RV in that you have no idea how much it weights. Best you can do is look at the Gross weight on the trailer label and expect it to weight that much in-tow.
Never let the sales guy say "Nah, this 8500lb trailer only carries a 650lb tongue weight. The dry weight isn't helpful because that weight is exceeded from the moment it is connected at the sales lot.

Always figure the maximum weight of the trailer and calculate 13% of that for the tongue weight. Weigh you and your family and your dog and groceries and firewood and add it to the tongue weight. Keep your truck stock including not adding a heavy tonneau cover or heavy 34" tires.
As mentioned, the higher trim trucks have low payloads so take all that into consideration before you buy a 'pretty/luxury' F150.

F-150 XLT w/ HDPP do not come with short beds. Regular Cabs and Super Cabs come with 8' boxes. Super Crews come with 6.5' boxes.

I have a 2021 F150 Screw XLT 301A 5.5' box Max tow. Here's my payload sticker.
https://cimg3.ibsrv.net/gimg/www.f15...780f8d7a75.png

Longer wheelbases help with stability and control. That's like dropping cylinders off of your engine to get more speed. If you're that tight with payload, do what the others said and buy an F250.