I love the solid flat tappets over the hydraulic, the key being quality rockers and polylocks.
Howards offers a great hot street sft cam, it's 238 duration and around 550 lift. Have that cam in the '69 SS and a copy of it custom ground in my '66 L72 vette. Love them both. If anything, next time I'll go a step hotter. Both engines are around 9.4 compression.
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