You should not have a big issue with lift on those cams since your actual lift will be .020 less or even worse than what is advertised due to geometry-but still check it to be safe.Lunati voodoos have more exhaust timing and a touch bigger intake duration when comparing similar advertised grinds to comps xe series,they are slightly more aggressive but none of these are big numbers in a street car really.If you look at the .050 valve timing the lunati 60403 is very close to the xe 274 and will perform similarly,lunati fudged the advertised numbers a bit so a 268 voodoo is actually a touch bigger than a xe268,thats why you really need to look at and compare .050 specs.Really it depends on your valvetrain,if your stuck with single springs w/dampers and stock rockers I would personally put in an xe268 straight up and call it a day but I would use the air gap for an intake.