Fortunately it was plumbed in just for show, but according to "Wizards of NOS" this is achievable looking at the website claims.
It's all stripped out of my M3W, and I am all restored back to normal.
If anyone fancies it, it's now "ebay fodder"
Even has the manifold so you don't have to drill your own.
https://www.ebay.co.uk/itm/S-S-X-WEDGE-Morgan-Nitrous-Oxide-Kit/183841578651
