For the 4.6L engine in Mark VIIIs it is as follows:
Key On - Engine Off: 35-45 psi
Engine Running: 35-45 psi
These pressures are the same in both circumstances stated above and are according to the service manual.
It is in the fuel tank.
Follow from tank
located in the gas tank
Yes
True, just the line pressure is lower!
30 front and back
Down by the oil filter.
No
Eight, one for each cylinder
In the trunk on the left side behind a panel in the lining
Not sure about all, but 96 recommends 91 octane.
go to markviii.org. they have a answer for almost anything with the lincoln mark viii