M_Boats: Main halyard winch??

I am doing modifications to my boat this fall which include leading both halyards to the cockpit and the topping lift as well. I have the hardware on the starboard for the topping lift and jib halyard but have a question about the main halyard. Unlike later models my 1975 has no winch on the port cabin top for the main halyard. What advice can you all give me as far as adding one? Nice to have, necessary? Thanks in advance! Robbin M-17 #056, '75 model "Miss Take" (no it was not a mistake but it is an inside joke with my wife on my life rehabbing boats)