[Jason K]

Hey Terry Thanks so much. I was leaning toward a 500vct transformer.  The problem with modern transformers is that the 6.3vac winding usually is not high current.  In this model the 6.3vac winding needs to supply around 5 amps including lamps and rectifier.  I have found 2 that might work:
I have found an edcor transformer # XPWR093 it is 500vct @ 300ma, 6.3vct @ 7A.
I know the 300ma is probably overkill, but would this work?
Also found edcor# XPWR072 550vct@250ma, 6.3v @ 7A. The 275-0-275 maybe a bit  too high though.