Well, Mitch would know the handling dynamics of the short wheelbase E body. If I used those in my longer 70 Charger, I'd have a severe oversteer condition. There is a ratio I read somewhere for determining a rear sway bar. It was something like size the rear bar between 60-75 PERCENT the size of the front. The front needs the huge bar due to the greater amount of weight the front end carries.
Also, look into the actual strength of that tubular bar. Once you get all the specifications figured out, you'll know what to expect.
OR you could just bolt it all in and feel for yourself.