What camshaft spec for 425 hp

12many said
Being a magnum I assume it’s got the factory 1.6 ratio rocker arms? or does it have aftermarket roller rockers and do you know what ratio they are? You say it has a Racer Brown cam, doubtful it’s a reground hyd roller, Not sure they do hyd roller regrinds or offer their own. Is it hyd flat or a solid?
Those EQ heads have excellent exhaust/intake ratios where a single pattern would likely be used. I’d say determine what you actually have, run it a few test n tunes to suss things out.
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It’s in the trans shop now getting a 727 trans installed in place of the 904 that let go. When I get it back I have to take the valve covers off and look at the rocker arms. How do you know if it’s a hyd roller with out removing the intake Manifold? The seller could be wrong about who’s camshaft it is. That’s why I was trying to get the cam spec. I lost touch of the the seller, he was supposed to send me the cam spec once he found it.