As of now I have crow 105 springs, viton valve seals, and zzp LS style retainers along with 1.9 modified rockers (will be putting stock rockers back on when doing the cam). I'm getting pretty close to ordering an S1X cam from Intense, and need to know if I should order the Manley retainers with the cam. I already have the correct springs and seals, but my concern are the retainers. They are regular zzp LS style retainers, and not the "modified" LS style retainers. ZZP states that with the XP you need modified retainers, and from what I've learned so far, the S1X cam is almost the same as the XP cam. Should I leave my valve train the way it is, or opt for the Manley retainers?![]()