On the "eight stack", it is a very nice "design". A few comments, not negative criticisms (FYI, there can be positive criticisms).
1) It appears to be a Windsor block. At least I see the tab in the back that would be necessary to build a Clevor, which it appears to be.
2) Molding that "plexiglass" like that is no small feat. Whoever did that is a true artist in it.
3) Those can't be Weber carburetors. You can not cover the 48 IDA's like that with any kind of a fabric element air cleaner and run the engine. They will all catch fire.
They are most likely the Borla Weber "look-a-like" EFI throttle bodies. The intake is not the "Detomaso" script intake or Hall copy.
I see the ends of the fuel rails stick out but the fuel injector harness is very well hidden from those camera angles.
4) You need to leave at least 48 mm of clearance above the tops of the stacks for the air flow or it quickly becomes restrictive somewhere around 4,800 rpm.
5) If I have any negative comments then I would have to question cutting the decklid so radically. This would appear to be highly likely just a "show car" but perhaps I'm just commenting on the "designer's taste" considering that the eight stacks all originate with the Gp4 comp cars to begin with?
As far as the other two cars, I question the function of those "dog bone" sideways air cleaners. They may look "kool" but they are in fact even more restrictive then the stock Ford air cleaner assemblies are.
I am a fan of 180° headers but they don't need to be made from exotic materials. Ceramic coated, inside and out over standard steel exhaust tubing will last forever and is much lighter then the 300 series stainless is.
Great pictures though. Definitely a morning treat for me. Thanks for posting.