After reading the manual, it appears that it may not be possible to wire the Curcio selector to operate properly with more than one phono input. However, it is easy to do with the original selector switch if you are willing to consider that option.
Remove the two 27 K resistors and 750 pF caps from the middle section of the selector switch. Then either install the 750pF caps on PC-6 in parallel with the existing 68 pF caps that are on the board, or alternately, remove the 68 pF caps and install new 820 pF caps. You will now have three inputs equalized for phono: tape head, special, and phono.
If you want to tweak the phono stage a little further, Curcio's changes suggested in this link are worthwhile: http://tinyurl.com/buytcpn
Hope this helps.
Last edited by Flyquail56 on Sun Dec 16, 2012 1:32 pm; edited 1 time in total (Reason for editing : typo)