The TA heads have an index where to drill to matchup with coolant supply from the TA block.
I have a template for the head gaskets which also must be drilled, but the question is do the Champion heads have a coolant passage to match the block passage?
As was said "none needed", but a few years ago Kenny D. checked before and after drilling the water passage on TA blocks/heads, and there was a significant drop in temp around the combustion chamber.
All the high HP with crazy boost on TA block/heads builds , were done this mod, street builds not necessarily!