Can I turn this cast iron grill into a usable firepot with possible tuyere? I have bought a cast iron grill or furnace and saw the top part had a nice shape for a possible firepot. The bodywork under the pan and grill is entirely hollow and looks like a pot. The hollow bodywork could help construct a tuyere inside. For airflow I have created a separate system that outputs an adjustable airflow through a 3.5 inch tube.

I'm wondering how feasible this is in terms of efficiency, as I am worried this will be as effective as a brake drum forge, which I don't find a good choice. The top bowl and grill can also be removed separately. Would it be possible to construct an efficient firepot with this or is it just not the right design or shape? If it's not the right choice, would that mean this is completely unusable as blacksmithing implement?
Will this be mounted inside a larger 'table' made with firebricks, refractory, or something else or do you intend it to be 'free standing' as is?  If free standing it should be suitable for light use (demonstrations and such) but I would keep to hand crank blowers as an air source.  I knew a smith who used a cast iron frying pan as a demonstration forge (he cut a hole in the bottom for the tuyere) and what you have looks similar in thickness.

It certainly could be used as the basis for a blacksmithing forge and IMHO would be no less efficient than a brake drum.