or just run magnum heads...then any SBC rocker works. Scorpion Performance has some nice ones that are USA made for about $200-250/set for SBC/SBF/AMC apps that would work with the magnums.

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)