Until very recently (2010), very little had been written and documented about these rare cars; however, there is now a website that is dedicated to the Talladega and Spoiler cars produced by Ford and Mercury during 1969 as they fired powerful shots during the aerowars.
Also, according to rumor from many sources (a sample of which also appears on the Talladega/Spoiler Registry, and is quoted here), Ford's Mercury Division may not have actually built 500 Spoiler IIs.

"NASCAR mandated that at least 500 of these hand built extended nose cars had to be manufactured.
According to some rumors Mercury built only 351 out of a reported 503 units.
How could they have done this?
As the story goes they built 351 extended “D” nosed cars; parked them in the front and on the edges of a parking lot; took 152 regular “W” nosed Cyclone Spoilers and parked them in the middle of all the Spoiler IIs in the parking lot.
When NASCAR counted the cars they just never looked closely enough at the cars in the rear!
However, it must be known that the Marti Report states that 503 Spoiler IIs were manufactured."

The legend goes:  When NASCAR indicated they would be coming to count cars, Mercury was way behind in production.
 As a last-ditch, "What do we do now?"
solution, someone mandated that 152 regular ("W" nose Mercury Cyclones) be painted up in Spoiler colors and trim.
 If you examine the handful of Mercury Spoilers (the "W" nose models), you will find that they represent quite a cross section of engine and interior options.
 Some are automatics, some are stick shifts, some are big blocks, some are small blocks, some have front bench seats, and some have front bucket seats.
There are less than a dozen known Big Block Cyclones left.
The lowest known example is vin# 9xxxxx49176 a 390 Improved Performance "S" code car that is also believed to be the only Factory A/C car.
This gives a great deal of credibility to this particular rumor.
Until very recently (2010), very little had been written and documented about these rare cars; however, there is now a website that is dedicated to the Talladega and Spoiler cars produced by Ford and Mercury during 1969 as they fired powerful shots during the aerowars. Also, according to rumor from many sources (a sample of which also appears on the Talladega/Spoiler Registry, and is quoted here), Ford's Mercury Division may not have actually built 500 Spoiler IIs.
"NASCAR mandated that at least 500 of these hand built extended nose cars had to be manufactured. According to some rumors Mercury built only 351 out of a reported 503 units. How could they have done this? As the story goes they built 351 extended “D” nosed cars; parked them in the front and on the edges of a parking lot; took 152 regular “W” nosed Cyclone Spoilers and parked them in the middle of all the Spoiler IIs in the parking lot. When NASCAR counted the cars they just never looked closely enough at the cars in the rear! However, it must be known that the Marti Report states that 503 Spoiler IIs were manufactured."
The legend goes:  When NASCAR indicated they would be coming to count cars, Mercury was way behind in production.  As a last-ditch, "What do we do now?" solution, someone mandated that 152 regular ("W" nose Mercury Cyclones) be painted up in Spoiler colors and trim.  If you examine the handful of Mercury Spoilers (the "W" nose models), you will find that they represent quite a cross section of engine and interior options.  Some are automatics, some are stick shifts, some are big blocks, some are small blocks, some have front bench seats, and some have front bucket seats. There are less than a dozen known Big Block Cyclones left. The lowest known example is vin# 9xxxxx49176 a 390 Improved Performance "S" code car that is also believed to be the only Factory A/C car. This gives a great deal of credibility to this particular rumor.
Mercury Cyclone Spoiler II