I was lucky I guess, In my quest I checked out an add for a 67 barracuda, supposed to have a 340. wanted 1100, talked down to 900. His story- driveline out of his totaled 69 S car. Swapped the driveline to my 67. #s matching 340 to 4spd + 8-3/4 sg.
Though this was about 20 years ago lol
Car`s still rockin to this day.