There are flat-face air dams for stock and wide-body cars, the rather rare and curvaceous Revson spoiler, and several blade-type spoilers currently available, and some guys have made their own. The choice is yours, but remember the Pantera was styled as a hard-edged wedge. Multi-tiered, multi- opening spoilers similar to those on jellybean style rice-rockets may not blend into the 30-yr-old Pantera styling real well. You could try scanning into a computer a few front ends you like, then scale them to fit photo of your Pantera, and cut-&-paste. It's some fussy-work, but not as much as trying to modify a spoiler that doesn't quite get it for you.
