Transmission, torque converter, updated starter questions

you have a 67 trans
if you ever have to rebuild there are upgrades available
if you are handy with hand tools you can -later- get a later valve body with part throttle kickdown and install the transgo reprogrmming kit yourself- will give you more durability- then swap keeping your original vb untouched
you have time to read up- see the TF thread at FBBO for a start
if you can score an A999 from a later 360 store it for later
replacing that seal is much easier now than later
new o rings on the dipstick and the shift/ throttle levers (on top side of the trans
also much much more easy now than later
for now concentrate on adjusting the bands and the kick down linkage
I have not run into that bolt thread difference- has the converter been replaced sometime in the last 50 years?
glad you caught it on the bench- working under the car that kind of thing can drive u nuts