If these are anything like the small block versions, it would probably be every bit as good or better than a TM6. Notice the lack of bolt intrusion on #3 and #6 runners. The old Weiand Xcellerator. This would be an earlier P/N without the Xcellerator name but it is otherwise identical to the later model.
And the TM6 for comparison
And the TM6 for comparison