Work is progressing very nicely! I see the snorkels cut right about where I plan on trimming mine back to. From there forward, I'd "like" to run red silicone car turbo hose to just above the oil cooler, with screened openings. Ah, dreams...anyway, we've seen the fabricated sheet metal (alloy) valve covers for Yank and Aussie V8s. Would be really nice, really pretty (really $$$) if a shop could fab a polished, tig-welded alloy airbox, larger intake openings being part of the package.
Speed of thought advancing to "tepid" here, the airbox lid is a simple shape. A sheet of .250"/6mm ABS, some cutting and some gluing might just provide a reasonable alternative. And, I can make the intakes the size I want - space between tank and frame as the runners go forward being the limiter. 3.00 inch/76mm silicone tubing could be compressed to oval shape between tank and frame I suppose.
What I really need: 1) more energy or 2) a younger workmate to carry out the work, and/or 3) warmer weather. With patience, I'll get #3.