Nice pictures Burty!
You mentioned that you had to take away some material on the bulkhead?, to fit the engine?
Can you make some pictures, to show this?...
Just curious...
I would also mount the pressure nipple in the back of the fuel cap. A hole is not there yet, you have to make it, don't forget to close the other 2 holes!
Rotating the nipple on the carb is also something I would do, to have a longer fuel line in order to allow the car to be a bit longer flipped on his roof before the engine will stall.
I don't have a picture for you that shows this, maybe somebody else has...