I used a silvertop as a got a donor car with low mileage and FSH for 300 quid but i think the black top is better. Either or really. Depends on whether you want the 1800 or 2 litre and what car it came out of. Just Google it, loads more info than i could tell you.

I used a silver ESC unit to control spark but you can go for programmable Ignition control, just depends on your budget.

Bike carbs need a good manifold, they can be bought of the shelf for 200 quid. Its the jetting and setting up is tricky if you dont know what your at. Again just Google it, loads of info out there