Well let's be honest, nothing we do is easy on parts, it's the nature of racing. Now is it abusive? No it is not, in fact the farther under you stall the easier it is on your converter. You create less heat, and internal pressure. We launch our Camaro at 4800 with a stall speed of 5800. So I would say you are plenty safe, as long as you are running a good quality converter. As a side note I'm a big fan of trans coolers.
Hope this helps
Dan