I love the Leaning Tower of Power!!, had one in my '72 Valiant.
It's an immortal sewing machine fueled by the hate of the ages!
I suggest..
-Later electronic distributor wired up with a GM HEI module
-Converting to a "Super Six" intake and carb
-Mount intake/exhaust manifold at 1/2 torque to head. bolt intake/exhaust manifolds together at full torque. Remove from head as an assembly, have the machine shop surface them together to facilitate the sealing on the head.
-Don't fight with the old intake/exhaust manifold studs/buttons. You can buy a new complete set from the Dodge dealership for like $9, worth every penny.
-Install some nice bright underhood lighting, becuase everywhere you go, people will want to see it!