The "D" type replica now has a lovely bright blue spark but fuelling issues have now appeared.
I think it's because the carbs are at the wrong angle to the manifold.
If you look closely the "flat edge" of the float chamber is angled back about 15 degrees.
I think this angle is preventing to floats from doing their job of shutting off the fuel. When I turn on the ignition I get fuel pissing-out of the carbs like six water pistols which is quite funny to see but dangerous in the workshop!!
The regulator I have on the fuel pump is turned right down but this makes no difference.
I think I am going to have to remake the inlet manifold !!!