I had to change engines from a 1980 Mercury to a 1971 Evinrude 50 H.P. Forced to change cable. Original boat steering cable was 11 foot through the engine tube. I am installing a splash well mount that was used with the Evinrude. Did the measurements and ordered a 10 foot rack cable. Installed it and it was too long and the excess cable hung out the side of the boat (15 foot Eldocraft aluminum bass boat) and there is no place to bend the slack cable into. I then replaced the 10 foot cable with a 9 foot and it is too short. I need a six inch extension, Also the new cable travel is only 8 3/8 inches and the cable connection point in the center of the engine travels 11 1/4 inches from far left turn to far right turn. Is it normal to loose turning radius with cable installation and are cable extensions made?