I now need to look at the fuel delivery system.
I have a few choices.
Make a manifold and fit these BMW 3lt coupe carbs.
Make a manifold and fit this pair Yamaha XS750 carbs.
Or modify the existing manifold and fit this Weber carb off a Essex 3lt V6.
The first two options will involve a great deal of expense. I think for the cost of having a manifold made I could buy a AC/DC welder and made the manifold myself.
I have always been a bit of a redneck so for now I'll use what I have and try and fit the Weber carb to the original manifold.
In theory I'll just block off the injection ports, remove the throttle body and replace it with as adaptor plate to which the Weber carb will be mounted.