I'm not really clear on the casting numbers, but if I'm seeing it right, the 13-04 suggests it is a T10. The final 903 says it should have an aluminum case, if so, it would be a Super T10. GM, Ford, and AMC used Super T10s for some years. More pictures and numbers might help narrow it down.
the case of it is cast but the bellhousing part of it is allumnium ? anyways how do i go about finding the right flywheel to bolt it up to a 350 the has a 168tooth flywheel cause the clutch disc it has now is alot smaller then the 168tooth flywheel that i have