Hi all,
I have a 68' F-250 2wd, C-6 auto, 390 4bbl, with a 4.10 geared Dana 60 and was wondering what is a safe tow limit. The previous owner had everything from a cab over camper to a 5th wheel set up in this thing and it does have a newer trailer brake controller. His trailer was about 6000lbs and he said this was fine but I am skepyical. Anyone out there have any thoughts on this? Thanks in advance for any input

 

Here is what I found


Fifth generation (1967–1972)
Another refresh came in 1967 along with a familiar name: the upscale Ranger trim line in addition to the base and Custom Cab trim levels. In 1968, federal regulations required all automotive manufacturers to add side marker reflectors or lights, so Ford redesigned the hood emblems to incorporate reflectors.<SUP class=reference id=_ref-2>[3]</SUP> <SUP class=reference id=_ref-3>[4]</SUP>The same year the trucks received larger versions of Ford's FE engine family with the introduction of the 360 and 390 cubic inch engines. The 302 became an option in late '69. The top trim for 1970 was now named Ranger XLT with Ranger, Sport Custom and Custom rounding off the rest of the line. The fifth generation bodies were noted for durability and simplicity of design making them a favorite for restoration.

Some trucks came with an outer flush mounted bed side compartment/tool box on the passenger side only.

After the 1968 models, Ford discontinued the "Low GVWR" versions. The Explorer Special (a trim package), Camper Special (built heavier for a slide in camper), Contractor's Special, Farm and Ranch Special, and Heavy-Duty Special were offered during this period.

The fifth-generation F-series was introduced in Brazil in 1971, which remained in production until circa 1992 <SUP class=reference id=_ref-4>[5]</SUP> with a slight redesign and changes in its motorizations.

The models are:

• F-100: 1/2 ton (5,600 GVWR max)
• F-110: 1/2 ton (4X4)(4,200 GVWR max)
• F-250: 3/4 ton (7,500 GVWR max)
• F-260: 3/4 ton (4X4)(4,800 GVWR max)
• F-350: 1 ton (10,000 GVWR max)
• F-360: 1 ton (4X4)(6,000 GVWR max)
• F-500: 1 1/2 ton
• F-501: 1 1/2 ton (10,000 GVWR max)
• F-600
• F-700
• F-750
• F-800

Engines:

• 1967-1972 - 240 in³ (3.9 L) straight-6, 150 hp
• 1967-1972 - 300 in³ (4.9 L) straight-6, 170 hp (130 kW)
• 1967 - 352 in³ (5.8 L) FE V8, 208 hp (155 kW)
• 1968-1972 - 360 in³ (5.9 L) FE V8, 215 hp (160 kW)
• 1968-1972 - 390 in³ (6.4 L) FE V8, 270-335 hp
• 1969-1972 - 302 in³ (5.0 L) Windsor V8, 220 hp (164 kW)

http://en.wikipedia.org/wiki/Ford_F-Series

 

Remember age of vehicle has a effect on components reducing capacity.