Hi, I would like to ask for some help regarding the manual tranny of a 1966 GT350 (VIN plate SFM6Sxxx). It was opened up to clean all the gears inside and when it was re-assembled back it won't shift properly anymore. The shifter will only go forward and back but it won't go sideways. Will someone who has a service manual for this be kind enough to share it with me? I have the Haynes manual pictured in the attachment but the transmission in this manual is different from what I have.