"Grafting a Mini subframe to a Spitfire will require chassis modifications which means, "Go to IVA, directly to IVA, do not pass fun."
Why? You can graft a custom designed five link (Frontline Racing) or independent system (Hoyle) onto the back of an MGB and you don't need an IVA. There was someone selling a double wishbone set up for GT6s but I can't remember who it was. The chassis was cut off and terminated with two, four bolt flanges. The new suspension was assembled as a unit and bolted onto the flanges. Again, no IVA required.
As for trying out a Spitfire, yes, I would definitely do that.
And all the time the rear suspension would bother me even if I never encountered anything whilst driving it to make me worry.
I have some irrational prejudices (they have to be irrational otherwise they aren't proper prejudices). These include:
- Porsche 911s (a triumph of development over design. They're all wrong! Rear engine! Aaaarrrgggh!)
- Griffon engined Spitfires (they just look wrong!)
- Subaru Imprezas (Do you have to pass an arse test before you can have one?)
- Range Rovers (See Subaru Impreza entry but a different type of arse)
- Turbocharged petrol engines (I drove an Escort Cosworth at Donnington once and hated the lag)
I think you can add swing axles with hooke type UJs to the list.:-)