Great pics Dave. Looks like a lot of work there. I have printed copies of your pics and hope to get started on mine in the next few weeks. Chop, Chop. I to will make sure everything is filled in and strengthened even if not getting engineered.
I also have a clearance problem with my harmonic balancer where you have with your sump. I don't like the idea of lowering the rack for clearance. As doing this only increases the size of spacers required to eliminate the bump steer. But I will probably have to do the same. As I don't want to cut into or shave anything off the balancer.
Anyway you've really made some progress. I want to have mine chopped and fitted for display at the Xmas BBQ and ready for fitting around March next year when the car might go back in to hibernation for the winter. Then there is no rushing around, as I want to ensure the car is fine to drive to Thredbo in mid Feb.