yes you can, unless something is seriously wrong with the truck or if you have too low of weight rating tires, but still 700 is like a fully dressed v8 engine, thtas nothing for a pickup, hell my litgtle yota pickup is hauling around a 350 chevy with stock little 14" tires with no problem at all not even really sitting down at all,
you can haul a bunch of engines in it all at once, and i still have my scrap receipt of when i put 4,440lbs in the back of my 68 c-10 with coils spring trailikng arm rear suspension and hauled it on the highway 40 miles to decatur, only modifcation i did was put on 6 lug 16" wagons with load range C goodyears, i still have those wheels and tires, the truck weighed less empty, 3850lbs
yes i was severely overloaded but i made it with not any incident at all,. that was the day that the entire rear of the truck got picked up by the magnet crane! the magnet head was exactly the width of the pickup bed at the rails tops, it just left a scratch gouge on the top side of the bed rail is all
it had a 305 out of an 80 caprice in it and a th350 short tail and the stock originazl 12 bolt 3.73 open, the 3.73 help a ton of course, if it had been a 3.07 truck then it would have probably busted a U-joint or worse or even the rear, shafts or pinion shaft,
rule of thumb is that 1/2 tons usually can haul 1/2 a tron or hair more depending on GVW
they weight around 3800-4200 empty and GVW is usually around 5500
so thats 1300 to 1700 you can haul legally without being overloaded, but youre supposed to follow the GVW sticker and load it to max front and rear both, not all in the back of the truck alone, youll be loverloaded @ the rear axle technically if you put all the weight in the bed
good luck