Would a factory torque converter from an h.p. 383/440 be O.K.
This is an absolute NO!!!!
My favorite customers that never understood why their stuff never ran hard was the following. Spend 5-10K on an engine, big camshaft, making good power and backing it up with a stock or $250 converter. Of course it doesn't leave hard or seems doggy when you stomp on it. LOL