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Quote:
Originally Posted by jimTN
Most important is that if you are using a reground cam, you must have the thick headed lifters or the head will have to be unscrewed out too far to stay adjusted. I have several engines with lifters that are not solid that have held up just fine.
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Kind of depends on the resulting base-circle of the cam and the length of the valves. If you run longer valves (like SBC length) - then the extra length makes up for the smaller base circle. Of course you need to setup your springs/retainers/shims for the proper spring pressure.