What modern 3/4 tons are rated to handle and what it can actually handle are two very different numbers.
Also, please post the law requiring you to stay within the manufacturers tire load and inflation sticker. I have asked this many times and not one person has ever been able to provide it. The only laws I know of about what a vehicle can legally haul or tow is in regards to the registered GVWR(which can differ from the trucks actual GVWR) and GAWR limits.
If you do not have much knowledge about tow vehicles or towing in general then I recommend staying within whatever the manufacturer suggest. If you have plenty of knowledge and experience to know what a vehicle can safely handle, then by this point you would have already known that a 3/4 ton can handle way more than what its (de)rated for.
