The Melling SPC-8 is suppose to be an OE replacement. Probably gets my vote if you want a RA 4 cam. Side by side comparison the SPC-8 I have had used a different cam core with a wider lobe. It’d been 6 years though, I don’t know if that is still the case. CMC grinds the Melling, Compcams, Edelbrock, Lunati and Summit 041 grinds. Specs are the same as the Melling, but I think those others that are not OE replacements use the normal narrow lobe core.
The Crane and a Crower 60919 both are different than the Melling. Crower is more aggressive, Crane is less aggressive.
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