I can't seem to get my TH to stop leaking.
It is leaking through the gasket.
I have replaced it twice, once just last night and today it is still seeping.
I tried Gasket with no RTV, then Gasket with RTV.
Leaks at the same spot each time.
I'm thinking the Housing is warped ?
Which spot, specifically, is it leaking from?
If it's coming from somewhere near the base, inspect the mating surface on the cylinder head (pay particular attention to the screw holes) and on the housing. If no defect is visible, get a flat bastard or mill file (or 120-grit sanding sheet stuck to a rigid flat surface) and clean up just enough to get it flat. I'd probably put a coat of machinist's blue dye on the thing before I started cleaning it up - it will show up any unevenness in the surface (as soon as you start sanding/filing) and tell you when to stop. You should
only remove enough material to make the surface flat (it is unlikely that you have to do any cleanup work on the head casting.)
Again, pay attention to the screw holes in the housing - check for any cracks between them and the "main chamber" that could be passing water when hot or under pressure.
Make sure you haven't "corroded through" anywhere on the two hose nipples, which could give you a leak from under a hose. Also, you can get a "corrosion channel" on the outside surface that can do much the same thing. In either case, the repair is actually replacement.
Tell us the specific location of the leak on the housing, and you'll get more specific advice.