Tracy's drive needs an automatic transmission flex plate and counterweight.
If you have both of those, that's excellent.

I want to determine just WHAT the flex plate is.. its NOT a flywheel of
sorts is it? Its ringed with teeth for the starter, and it has holes
that MAY be useable for mounting... but I am not sure if the "flex
plate" is in fact the auto flywheel? or something I need to remove from
the weight when attaching a new flywheel (that has yet to be bought)..