So i picked up a OEM toyota tow hitch of a 1992 4runner and put it on my 86 4runner. Im hoping to be able to put an aluminum dual motorcycle rack on there to haul 2 surron style emotos that weigh about 130 each with the batteries removed. My question is will this to tongue weight of around 310 ish pounds be ok? Stock gears 32 inch tires. Thanks