410 LA small block will not rev past 6000

PRH said

I didn’t catch the 4 speed info.

I re-read the OP.





It would seem as though since it’s been together for 7 years……he’d have a pretty good handle on the engines behavior.

I don’t know what it is, but I’m quite confident it’s not anything to do with the head flow on his build.

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Yeah, I originally said head limits but that was before I figured out it's a hydraulic lifter.

I haven't messed with any hydraulic stuff since the early 2000's but back then, to get any RPM out of them we went to 20w50 oil and bigger pushrods and that was good for some RPM.

At this point I think they started going the other way...lighter oils. I don't pay much attention to hydraulic anything any more.