Scrapper, you might want to familiarize yourself with the Metro before trying to answer questions about it.
There is no separate race. The rear uses two one-piece single row ball bearings, separated by a spacer.
And yes, you over-torqued them. 129 ft-lbs is for the fronts. The rears get 74 ft-lbs, but some people will even go less than that.
You have the spacer between the bearings, right?