slight stutter under light load

[camarojoe12]

The build is complete, roughly 4xx miles on it now. since I have started driving it after the rebuild I notice a very slight stutter, almost misfire like I've never driven a cammed car so is it possible that its normal? .ALSO just got the computer back from madz28 I'm now noticing a bad egg smell ever since I got the computer tuned, it was fine before hand not exactly sure what may have happened there.