I have a vintage Westar WT200 radiogram console...

Perfect original condition with a working Telefunken record player,EL 84 output tubes ,everything works perfect.Question is should I modify it so I can hook a pair of Spica TC 50's on it.
You should probably have it gone over by a technician and recapped at the minimum before making that decision. "Recapping" old capacitors should not be expensive. Even though your unit "powers up" and seems to work fine, you really shouldn't use it until this is done.