Not as far as I know. The ones I saw in Pasco after BN took over still said Empire Builder. And don't forget that four of the cars didn't belong to the GN, one was SP&S and three CB&Q.
According to the one book I have on Amtrak in the 70s, they only ran two of these cars. Lewis and Clark Pass was purchased, and was BSB. Jefferson Pass was leased in 1973-74, and was still in EB colors.