IIRC, 440Jim said the AeroHead heads he got for his 'Cuda some years ago were better described as a "parts kit" than "ready to assemble" because of the (lack of) quality of Indy's machine work. Unless that's changed, there's no way you could compare their heads, even w/ all the above mentioned upgrades, to what Dwayne, Jeff or Brian would deliver for the same, or not much more, cost. Lots of people seem to have a hard time grasping this.