does a 904 slant torque converter=904 sb torque converter?

I'm doing a slant six to V8 conversion, and I want to know if you can use the torque converter from the six and put it in the small block bellhousing. because the small block trans didn't come with the torque converter. however it is a freshly rebuilt transmission. and can you use the same flexplate? any ideas? any suggestions? and what else do I need?