If your Pantera came from the US, it has a smaller rear sway bar - this was as-designed by Ford to induce more understeer and make the car "safer" for American drivers accustomed to lumbering barges that plowed through turns with a great deal of understeer. Ford was afraid these drivers would wind up in trouble real quickly in a car that might tend to oversteer. A 1 inch sway bar in the rear corrects the understeer tendency and makes the car's handling more crisp in the turns with much less understeer.
Now adding a larger front sway bar will just counter or negate the effects of the larger rear sway bar. A 1 inch front bar is not necessary. Actually, one PCNC member took his car to a suspension tuner who found that optimum handling was achieved when the front sway bar was removed altogether!
Note that all of the above is for a narrow body car. Wide body cars may be a different story altogether. And, intended use will significantly impact what's best as well.
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