i have not done a lincoln or 2950 in years but looking at the schematics here are some cap values that i would use that will get you in the ballpark, some slight changes could be needed to suit personal tastes, i added +b or +t to indicate which cap does what that way you can make alterations if you want to add or remove more bass or trebble , all values are in microfarrads and cap numbers taken from the lincoln schematic
RX....
C35 0.039 CHANGE TO 0.022 +T
C36 0.0068 .............. 0.1 +B
C105 0.01 ............. 0.047 +B
C107 0.047 ............. 0.1 +B
TX.....
C57 0.068 .............. 0.1 +B
C58 0.0047 .............. 0.0022 or remove +t
bleep mod,
changing c72 and c74 from .0047 to .01 will half the beep frequency making it sound like a george bleep, different and easier on the ears
there are a few more but i would need to sit down and study, the values listed will make it sound less constricted