I got the composite spacers off Ebay to try to get better heat isolation from the carbs. and manifold. The spacers are 1/16 thicker than the original aluminum spacers. I would assume that this is not enough to cause a hood clearance problem but I hate to ever assume anything. I know the Mummert intake for the T-Bird is not as high as the one for the passenger car but I don't know how much lower. I can have the machine shop take 1/16 off the manifold but hate to do it if it is not necessary. Opinions??