is there any better pics of it?

 

I don't call this a duck tail, don't look near as cool IMO...
To me, a duck tail wraps around to the quarter panels.
Or built in like the original 68 Shelby.

 

You could always get the Street Scene or CDC ducktail and have it molded in. That's what I want to do someday. I've seen it done with the Cervini's one and it looked great.

 

are the cheap prepainted gt500s from ebay any good?

 

Yes, I have one as do many others on here... and I think you can find one for 130 or cheaper prepainted and the paint is fantastic from the spoiler store....

 

here you go BBR

 

The GT500 spoilers from Atlanta Mustang and eBay are good quality and the paint match is dead on. You really can't beat it for the price. I paid about $220 from Atlanta Mustang, right before people starting buying the eBay ones. But, I still feel that was a good deal for what I got.

 

I like to see that car in a couple years from now...[8D]
Especially a DD in the South or West Coast lol.

Those Urethane plastics pieces constantly move/shrink with temperatures differences.
It'll be Crack City after a while.

I don't advice you to do that, unless you use fiberglass pieces.
Even then, you're still not safe for cracking problems.
The 67 Eleonor come to mind, built by the then Unique Performance morons[:'(]