Just a quick thought
If you did use the Scimitar SE6 as a doner ie, used all the major component fitted to your new bispoke chassis you would still need as IVA but you would keep the doner's registration number!!! NO "Q"
And the build would be easier as only one doner would be needed
The complet front supension can be moved forward so only the steering colume and prop shaft would need to be altered to fit the wheel base needed and this could be done on an exchange basis when the kit is collected.
I really should get-a-life