Found this writeup

HEAVY-DUTY PAYLOAD PACKAGE (627)
Usage: Increases GVWR to 8200 lbs. for improved payload and
towing
Availability:
• XL and XLT: Regular Cab 145" WB (8.0' box) and SuperCab
163" WB (8.0' box)
• XL, XLT, and Lariat: SuperCrew 157" WB
Not Available with:
• Off-Road Package (55A)
• XLT Custom Package (86C)
Requires:
• 5.0L V8 Engine (99F) or 3.5L V6 EcoBoost™ Engine (99T)
• Trailer Tow Package (535) or
• Max Trailer Tow Package (Max TT Pkg. required when ordered
with 3.5L EcoBoost™ Engine)
- Lariat: Max Trailer Tow Package (60C)
- XL: Max Trailer Tow Package (60M)
- XL/XLT: Max Trailer Tow Package (60P)
Includes:
• XL: High capacity 17" 7-lug steel wheels (64K)
• XLT/Lariat: High capacity 17" 7-lug Aluminum wheels (64W)
• Heavy-Duty shock absorbers
• Upgraded springs, radiator and auxiliary transmission oil cooler
• 9.75" gear set
• 3.73 limited-slip axle
• LT245/75R17E BSW All-Terrain Tire

 

Thanks I didnt realize that. I mean it looks like its giving you a lot of the max tow options and basically 800lbs more payload. The payload isnt that much less than a 3/4 ton