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You all validated what I suspected. I will sleep better having made the investment to go through these heads completely. Others that believe the OOTB viability of these heads, YMMV.. Agree with the surface finish comment too Moper, the .003 true up cut we made first was primarily to remove this...

I am hoping a couple of the experts can share their opinions, findings, and experiences with Edelbrock heads. I am in disagreement with one of the volume sellers of the LA Performer RPM heads over what are acceptable "out of the box tolerances" for these and his immediate response was if you...

There are no drop in hydraulic roller setups for 340 LA, if for no other reason than there is no standard pushrod length for any of the aftermarket lifter options. A mechanical roller doesn't have the height issue with a simple slug and roller tip. Hughes makes (sells) hydraulic roller lifters...

Glad that got resolved for you. btw, valve piston contact isnt necessarily visible. Interference in the thousandths is all it takes to bend a valve enough so it wont seal properly ever again. Depending on the dynamics of the valvetrain at 7000, is the spring keeping up, is there flutter (valve...

Jerry, what do you suppose caused the pushrods to bend? You said you hit 7K, RPM by itself doesnt bend pushrods. Then the thread turned to chamber volumes(?) You bent pushrods because something collided, most likely a valve to piston. Has your LMS disassembled the heads and measured out your...