You gotta see this ......

harrisonm said

So from what I hear you all saying, adjustable rocker arms are a good upgrade on even a stock 340. My 340 with stock rockers is at about 375HP, so you think I'd benefit? And it sounds like you believe it is pretty much mandatory for Edelbrock heads. It is interesting I have never heard this.

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It's all about valve lift and the resulting full open spring load, the cam ramp speed and the resulting valve lift speed, and the peak RPM's.
- Lower lift and slow ramps, like a stock 340 cam, would likely be just fine.
- Fast ramp cams like XE's and Voodoo's, are going to put more force on the valvetrain parts due to the fast ramps.
- Higher lift increases the full open valve spring force.

So what do you have for cam? And do you have the springs that came with the Edelbrock heads?