Minimal? By adapting SU's or Webers to work? You sir, are in for a surprise.

Let's see, for starters; linkage, choke connections, jetting, wiring (if you go with an electric choke), water connections (for thermostatically operated chokes) or running a cable for a manual choke.

Mileage will suffer because if I remember correctly you have the higher compression head. You'll have to run it rich to prevent spark knock under load and at speed.

Since you have access to a machine shop, why not convert to a TBI using a Megasquirt ECU?