I recently replaced the valve springs on my mustang with Explorer heads with the trick flow valve spring upgrade kit along with stock length Ford pushrods and stock replacement hydraulic lifters the roller rockers are stock so is the manifold now after startup it is quiet and very little noise but after warm up it starts ticking tapping and gets much louder as the RPM increases I'm running 10-30 oil can anybody give me any suggestions on what to look at next thank you.
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