Len,
Sorry about the delay in getting back to you. I used the front/rear spoilers first at the Monterey Historics. The front end is certainly more planted than it was at California. I did continue to have a loose rear condition under heavy braking, in fact I did have a spin going into the "Andretti Hairpin" (turn 1) in the main event. We changed the brake bias at that point and that seemed to help.
At the Rolex Vintage Festival 2 weeks ago at Limerock, we set the rear spoiler at it's highest position. It seemed to have a remarkable effect on high speed braking and overall stability in the high speed uphill and downhill sweepers. Limerock is a short (1.6mile) track with a short front straight but high speed sweepers.
The car performed remarkable among a very competitive field of Chevrons (3rd place overall in the 1st race).
Overall I'd say the spoilers add much needed hi-speed stability, especially under braking. I'll be running the car next month at Sebring, and Daytona in November. That will be the test.
Also, I broke the ring & Pinion gears at Limerock. Fortunately there was no damage to the internals of the ZF. I'm replacing the 4:22 ratio with a 3:40 ratio to get higher speeds at Sebring & Daytona.
Regarding the Dark Green 40...It was driven by Bill Murray, of the "Shelby American Collection" in Colorado. Bill is a very accomplished Pro, Semi-pro driver who has raced nearly every type of Shelby extensively over the past 30 years.
I'll keep you posted on the progres.
John