Valiant towing capacity

A lot more to it than power. BRAKES and HANDLING need improvement 2K is no small matter for a car that light

Make the brakes the best they can be. Drum brakes can be quite tricky especially nowadays that you might not be able to easily get replacement parts

Consider air shocks or other overloads, or even find a junk set of rear leafs and add to the stack. Try to find bigger T bars an make sure you have good shocks