Dave, that's the same model as my original aluminum Char-Broil grill I had in the 70s
it's the late 70s~80s model that had the slide out ash drawer on the bottom, to make it easier to clean up after a grill
but the ash drawer killed it as a good indirect cooker. too much air leakage all around the drawer
mine also had the cast iron grates
it was a SERIOUS grilling machine, but that's all it was good for
the earlier model I have now with the solid bottom and just the 4 vents is THE aluminum cooking machine
and like my OldSmokey, it's so light, I just pick it up and dump the ashes out of it after a cook
btw- I still have the grate lifting tool that came with that grill