Bit more progress.
Old inlet no longer fits with the new cooling pack, nor would anything else I could see on the market, so here's the first part towards its replacement:
Then on to a job I've been putting off for a while - major surgery to the front inner wings to clear the tyres...
Seat is now mounted around 12" further back and more inboard than the original location. We've ended up using a floor mounted tilton pedal box, as well as making a new steering column. We'll need to relocate the shifter and have some longer cables made next.