383/438 Build
Checked, checked, rechecked. . . I ordered 7.950" pushrods. Comp Cams P/N 8414-16.
They are 5/16 diameter, .105" wall thickness.
Something I learned about the Comp Pro Magnum Rockers, is that one full rotation of the adjuster is .050", in case anyone ever needs to know this.
COMP Cams: Hi-Tech™ .105" Wall Pushrods: 5/16" Diameter, 7.950" Length