904 factory torque converter ID

I am replacing my 1977 318 904 with a 1969 318 904 . My 77 318 904 had a torque converter from a slant 6 that stalled at 2600 rpm with my 318. It has a cracked hub, so I can't use it. The 1969 318 904 has an unknown factory style torque converter. I haven't found numbers on any of these torque converters.
Thanks for any help