When good is not enough, Camshaft time again.

simplest answer is hone the cam bearings to suit the cam.
neil.

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Have had them where you have to wind in the cam with Lucas engine assembly lube.

When the lube starts turning gray and cam is getting tight. Back it out, wipe off the gray, relube and go again.

By hand, no power tools > so you can feel what is going on. The cam bearings are soft, so they will open up first.


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