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You guys DO realize that the MAGNUM 5.2 and 5.9 engines came with 1.6 ratio rocker arms, right? Factory stock and cheap.

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Yes, I'm quite aware of that. Let me try this again. The whole point of the post was to see if I could use SBC rockers on my Magnum heads. I want to use an adjustable rocker arm. I was concerned about the idle quality when using THE STOCK 1.6 rockers and the cam I'm running. That's why I asked about the use of 1.5s. You can read all of this in the previous posts above