wonder if the hydro lifter is dictating your rpm capability, not the wide LSA and the heads.
if i had heads with a good flowing exhaust port, i'd run a singl epattern cam with wider LSA.
I'm sure it has some to do with it, but smaller displacement engines run hydro lifters to 6500+ on the regular so that's where that comes from. I could be entirely wrong, it's just a working theory.
I agree on the cam though, I wanted a single pattern with ~.625 lift and 250~255 @.050, but couldn't find anything readily available (I had some time constraints) so went with the closest I could find. I figured I'd rather have too much ex duration than not enough lift or intake duration, though I would have really liked to have found something on a 106-108 LSA. Oh well, timing cover gaskets are cheap ;)
