I just bought the Livernois Adapter Plates for the PI intake on NPI heads. I have not yet recieved the adapters so i cannot know for sure how thick they are, but it looks like the plates seem to be roughly 1/2" thick judging by researching on this site as well as other mustang forums. However, i have also found that Livernois mills down their PI intake to compensate for the height of the adapters. My question is, does anyone know if these plates will work with a NON milled PI intake on a 96 hood? Also does anyone know what intake plenums are available that are not any HIGHER than stock, as this may obviously interfere with the clearance problems... an example of a plenum that is higher would be C&L. Thank you for any help and guidance.