So your saying, and I presume you have a C34 4WD manual(which I have driven I might add) with minor mods(240kwATC/380nm's/1600kgs ) can keep up to a 310kwATC/565nm's/1700kg's)?
BTW you would have about 150-160kw's ATW's vs 200kw's+ for the F6 or the SS Wagon is about 180-190kw's ATW's
But I guess you were there and I wasn't......stranger things have happened!
BTW: ATC = at the crank