For Sale: Brother steel track, 53cm

I'm not sure, but pretty sure the geometry is the same in the chart posted above, they just changed the sizes of the seat tube.

I'm 5'7'' and it fits me pretty well, a bit on the small side i guess

Crap, seriously? How do you reckon I'd fit as a 5"10? Always though 53cm would be perfect, or do you think I'd need a new spine every mile?