-only raw muscle power
Hard to tell from Goku's end considering how tricky it is to find solid strength feats for DBZ characters within specific arcs. I know with later ones, he's shown to be strong enough to punch foes through mountains and islands. If we were judging off later arcs, Goku could easily win this arm wrestling match.
But I haven't seen battles involving the Ginyu Force or other fodder from Frieza's forces in quite a while from DBZ.
There is seemingly no 'perfect' way to truly say goodbye. So I gathered a bunch of them!