The restrictor plate maybe refined down the road with velocity stacks, but for now it servers it's purpose trying to get the intake tuned in....;)
Dave, See post #79, alternator dead, horn was from low voltage warnings.
Currently working on a progressive style linkage that will or may cover the flat spots. Obviously there's a tremendous amount of air off idle, progressive linkage should move the TPS at (example) an approximate 2:1 ratio, so coming off idle almost instantly puts it into a mid range position.