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What richardpalinkas has suggested could work, I haven't tried it myself thoughLooking forward to it! Very keen to get something to work.
I think the main problems would be the rear plug on the manifold (mine has no play what-so-ever with the 12mm spacers), and maybe the clearance for the top left short bolt near the firewall. Is it possible to buy (/or make) and extension for the rear plug?
Or just unbolt the wiring harness at the back to make more slack.