I 2nd the delay line. Had a few on 60's sets IIRC RCA's.
Also is the 6EA8 in the IF ?. Usually its mixer / osc in
the tuner.
After the delay line do the IF tubes & sub the tuner to be sure.
Alignment a LAST resort & I wouldnt do it without 3 NOS
exact number IF tubes........
73 Zeno