peak halyard

[SV Papillon]

I have a question on how to set up a gaff peak halyard. The way it was / is set up on the foresail is a double block with a becket leading to a block at the end of the gaff and another block about 3/4 to midway. Does this sound right? I'm guessing it was set up this way due to no halyard winches. I'm thinking about putting some winches on and wonder what sort of purchase there should be, or are they not nessesary. Sail is 400 sq ft

Thanks

Jake