help need 904 transmission for slant six

66 is a tough one, I have a few 65's but they are cable shift and your 66 is linkage shift. I have 72 you can have for 60.00 if you pull it, it was working good 4 yrs ago but the crank register on the torque Converter may be larger than your 66. I am about an hour and a half north of Diego.