Need a plan - component selection for restoring 68 340 that runs on 91 oct

I would buy a set of IMM Indy LA X heads and grind off the Indy logo leaving the X in place. Use SRP forged flat tops -5cc, .040 head gasket to set quench, and a SFT cam 230@.050 cam 3.91 gear. The closed chamber head has hardened seats and will perform better on today's pump gas without retarding timing ect.