You need:

Small block B/E body 4 speed transmission (small bearing retainer on front)
E-body shifter with pistol grip handle
E-body shifter mounting plate (triangular aluminum)
Square shifter boot (rectangular hole)
E-body reverse shift rod (J shaped)
4 speed shift levers on side of trasmission

You can re-use your original driveshaft, clutch, bellhousing and 2 shift rods.