^Yes in the upper RPMs, I haven't seen direct testing on the GT500s but on the CJ Coyotes a Mono pickups up about 7HP over a twin 67mm at 7500 RPM so id only imagine it's more on a GT500
Yep, I have the twin 72 right now and was looking to see if it would be worth swapping to a mono, I would likely do the big whipple if I did. But at 8 hp I prolly wont.
Yeah for only 8 hp I wouldn't mess with it. But twin 67 to mono is a 29 hp gain and that seems worth it to me so I know what my next mod is going to be, 700 club here I come!
I think mine just seems to be luck of the draw. I spoke with one gentleman who had two shelby's both with mono blades and one had issues the other didn't. He purchased them at the same time.