As far as I know, just the light duty 3 speed (303 I think) and the T98 4-speed came standard. The clutch sizes differ. I think 10" for the 3-spd and 10 1/2" or 11" for the 4-speed, can't remember exactly. John Mummert makes/modifies bellhousings for the 223 to accept a C4 auto trans. Google his name...he has a lot of Y-block stuff!
There were two 3 speed transmissions and one 4 speed. The light duty 3 speed and t98 like you said but there is also a medium duty 3 speed. Someone will have to chime in about auto's. I hate those things. I do know that it is very simple to adapt a t5 manual to a 3 speed bellhousing.
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