Ian, there is more room between the header and the block than is apparent in the previous pictures. The picture below is a top view. While the stock spark plug wires won't work, I should be OK with high-temp, low profile right-angle boots. I need to purchase some to check fitment on the actual block (it would be nice if the plastic block had threaded inserts for \spark plugs).where will you run the spark plug wires and how will you remove the plugs when you need to do a service on them?
The MOMO steering boss has a steel spline and a steel collapsible section cast into an aluminum hub. The collapsible section takes up a lot of space and isn’t required because I have a custom lower shaft that provides over four inches of zero-resistance collapsibility BEFORE the steering wheel hits me. So I cut the steel section off with a bandsaw and faced the surface on a lathe. I was concerned about machining the steel embedded in the cast aluminum, but that went better than I expected. It was at this point that I realized that I’d need to remove the outer aluminum shell to accommodate the six mounting screws for the adapter. Once that was done I realized that I’d also need to machine the inner hub as well. All in all a lot of time on the lathe. As can be seen in the picture below there were some air pockets which don’t provide a warm-fuzzy feeling.In heaven the French are the cooks, the Germans are the engineers and the English are the police. In hell the French are the engineers, the Germans are the police and the English are the cooks.