Best bolt ons for a small block

On my '71 318, I started with electronic ignition (Mopar Performance kit from ManciniRacing), then added 2 1/4" dual exhaust (factory manifolds & FlowMaster 40s), then added an Edelbrock 1406 on top of an LD4B intake manifold (with Lokar "kickdown" and throttle cables). The car has the factory installed A904 automatic transmission & 741 case 8 3/4" rear-end with 3.23:1 sure-grip.