340 issue after camshaft change

RustyRatRod said
I never have used the MP valve adjustment chart. Never have used the EOIC or ABC, XYZ, PDQ or LQBTQA+ method or whatever the hell else there is. I get ONE camshaft lifter at a time on the base circle of the lobe and adjust that valve and move on to the next. Always done it that way and it's always worked well "FOR ME". That means turning the engine to close the valve you're fixing to adjust and turn it "a little" more to assure that lifter is on the base circle of that lobe. Anything else is just too complicated for my simple mind. You have the valve covers off. You can shine a light into the intake valley through the heads and SEE the camshaft lobes and lifters and make SURE they're on the base circle. Simplest way ever to do it, IMO.

I believe the 180 degree MP chart was made to be an accurate method that was useful at the track vs doing one at a time. And the other 90 degree chart is for bigger duration cams iirc. Whatever works for anyone as long as you do it right right?:thumbsup:
I will tell you this, and I know you know, not every cam lobes base circle is accurate, many can be out of round (due to old machinery etc) as you rotate from the close side to the open side of the lobe. You move the cam one way or the other on what is still considered the base and you may find eye opening variances.