That is great news to hear that some serious minds took this issue to task.
It was a fairly simple task to be honest: Greg (Bronze Bird) and I did it in less than an hour one night while we loitered around my 68 rear end and its NEW "69 spoiler for a 68". It was obvious that the aftermarket spoiler I paid nearly 300 duckies for was: 1 - too long, by over one inch in overall length 2 - not re-enforced enough to handle the weight of the fiberglass in the middle. It bowed in the middle after just 4 weeks of use. 3 - Too high, the pillars are easily .40-.45 inches too long (high). The too-long pillars cause the infamous WING spoiler look. That is, the spoiler is floating above the rear end and does not come anywhere close to contact with the rear body of the 68. 4 - Too weak at the pillar hardpoints. The screws holding the pillars to the underside of the spoiler eventually crack through the topside of the spoiler as you use the trunk over and over. This ruins any paint jobs or body work done to clean that area up.
ALL four issues are unacceptable, but are the current truth on these spoilers. I wasted big bucks on this and sincerely wanted to hurt someone for my cash loss. The response is always "we did our best".
Other than that......I just love that spoiler of mine! If a better one comes out, I'll buy it in a New York minute.
'68 428 HO M3 Monster, 4-on-the-floor! Need I say more?