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  1. Z

    Lifter preload tolerance..

    Lots of learning on my first top end refresh.. Car is 66 300, 383. Very much a street cruiser. Stretched timing chain kickstarted said top end refresh. Lunati 10230702 cam, matched lifters and springs. Stock stamped rockers, currently no budget for adjustable rockers…but may have to...
  2. Z

    Valve spring shim ID too large..problems?

    Engine guys…I’m shimming my valve springs to attain a set installed height as part of a Lunati cam upgrade which was progressing fine for a second.. My question is..the ID of the shim is slightly larger than the valve guide boss/seat by about 30 thou. 1.500” OD. Should be 1.000” ID is needed...
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