I have a 1975 Legend 37.5. I want to replace what think is the original haylard for the mainsail.The shackle hjas a starage curved shape, and I wonder if I order a new halyard with a U shaped fitting if it will be a problem? I would also like advice from others if they have replaced haylards on the same boat as to what line they ordered and if they are happy with their choice. I do not race anymore... I am a crusier.