I have a 1994 20' 520 flex head s_n 2040634f that came off a 1981 N-6 ready to go , only has about 250 acres on it since we put new knives on it. Our N-6 blew the motor and we bought a r62 that came with a 30' head e-mail kingbros@watchtv.net if interested and I can send you pictures.