I felt sometimes frustrated with MPI scenes whom shooting places are really hard to locate . For numerous scenes, it occurs that the way (very close framing and quick shooting time) It was shot, prevents the observer to spot even any clue. If you consider the 40 years of spanning time elapsed, you understand that it could result in some very elusive findings...or dead ends...
So, feel free to interact with this new heading since the following developpements are only, lacking anything better, my imperfect assumptions.
Of course, for the most verifiable locations, i will pursue as usual !
If everyone agree, i will allocate a specific nickname for each "Mysterious location". What about "Misty"? I find it very evocating for Vietnam war amateurs...

Each MISTY will be duly updated progressively.
For MISTY 1, let's get back to « 1.10- Thicker than blood ».
On the search for TC's buddy poor Joey, occured a very short outdoor scene. Our three heroes, packed in the Ferrari, speeding through what seems to be Honolulu's suburbs, stopped at a decaying slum shack...
https://ibb.co/SRd70VB
https://ibb.co/Zz2pnTh
https://ibb.co/5GmfdzX
https://ibb.co/yPzR7PF
I tried in vain to locate the background residential building.
The number '2426' ont the front of the shack is of no help.

What seems to be second class appartments for renting bears a sign « BLU SHELL ».
I got the intuition that this location might be not so far of waikiki beaches...
Of course the support of a wise Honolulu resident would be appreciated !
Thanks for your feed back !

UPDATE: Thanks to Sam 'Misty 1' is located ! The place address is 2417-2431 Prince Edward St. ! Joey settled only 200 yards off Waikiki beach !
The blue Shell appartements for renting are now the King Edward's:
https://ibb.co/k5Bf6pq
https://ibb.co/dgZVcWV
The Slum Shack disappeared, advantageously replaced by foliage... however, the spirit remains with all that abandonned garbage in front !
https://ibb.co/59qyfHn
https://ibb.co/2KXX3vc
So let's summarize Sam's finding:
https://ibb.co/p0kK7P4
A good teamship work !
