if I were looking at aftermarket roller rockers for magnum heads, I'd take a long hard look at the scorpion performance AMC ones http://www.ebay.com/itm/AMC-290-304-343-...=item2c62e7b44dthe pedestal mount rockers on the magnums are a direct carryover as the old AMC 290-401 engine rockers.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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