I'm in on this great idea...
Lots of parts sitting here looking for a new home... I just need a list of what's needed, and I can check my pile(s).
As a first step, I suggest we decide exactly what we're going to do... specifically and detailed. Understanding of course, that no 'plan' is unalterable and that the ultimate 'product' may not ultimately turn out to be our initial 'target'. But we do need a definable objective to work towards.
I suggest we select a "project manager" to come up w/ an objective (I guess the contemporary phrase is "Mission Statement") and a plan to get there. Then, come up w/ the various 'sub-assembly' managers (driveline, body, engine, interior, etc...). Also need to come up w/ logistics and supply assistants, either at project level, sub-assy or both level(s). Determine parts collection and assembly location(s).
If this is to be a charitable effort, we should endeavor to get the right IRS designation for 'suppliers' to be able to write-off donations. As well, b/c there are some liability issues, we may want to make this a non-profit corp. to protect the managers, suppliers and assemblers. (Leave it to the lawyer to come up w/ 'friction points'.

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In regard to titling this vehicle, I'd suggest we either procure a frame or tub... or both that has a valid title thereto assigned and incorporate that/those pieces in some
'significant' way. The vehicle is then legit. - legally and ethically. We can choose the state to title our 'creation' based on their definition of "significant" (or whatever term/phrase they use to determine legitimate VIN transfer/usage).
Once a basic working organization is created, I suggest a seperate forum(s) to describe organization & objective(s) thereof; detail planning/coordination (or announce changes thereto); make donations; track progress; highlight notable issues, etc...
Volunteers for project manager and/or other positions, or requirements?