Flexi hoses

You'll need four short lengths of flexi-hose to mount the carbs to the manifold runners, this is to reduce the amount of engine vibration that reaches the carbs which can cause fuel foaming.

All you need is a flat length of metal thick enough so it won't flex, giving a sound face to the head, then five bits of pipe welded to it in the right places at the right angles.
Bike carbs need mounting at their original bike angle to give the correct float chamber situation.
I also had to make a throttle return spring set-up.