If the oxygen sensors for the 1991 Chevy 4.3 is running rich when it is warmed up it is best to have the sensors replaced. Once the sensors are replaced this should resolve the issue.
Yes it will fit. 91 and 92 exactly the same
No
No, because the two years have two different body styles
Yes, infact I own a 1991 Camaro RS V8 5.0. I purchased it in 2007.
It has ( one oxygen sensor ) on the 1991 and 1992 Ford Explorers
1991 to 1992 rs or z28
Not Enough
205
8 degrees
i believe theres only one and its located in the exhaust pipe
8.5 inch 10 bolt.