904 parts in an a500?

Can I use a 904 direct drum, pump, and forward drum on an a500? I need to use a non-lock up converter. I was told that converters with a stall aren’t available for an a500. So I would need to use a 904 converter.

Thanks

http://smrtrans.tripod.com/smrtransmissionsintro/index.html

Thanks, I'll give them a call in the am.