There is one before and one after the catalytic converter.
Yes
yes
1977-85 Impala, 1977-90 Caprice
Any 1977-85 Impala or 1977-90 Caprice will work
I have a 90' Caprice with a 305 that I brought up to 130mph.
the oxygen sensor is grounded when you thread it into the exhaust manifold the oxygen sensor should have only 1 wire it should be purple the didnt start putting 2 or 4 wire sensors in until the early 90's there should be a ground from the battery to the block
Yes.
116"
the crank position sensor can cause similar symptoms jeep is known for crank sensor problems
well my 86 caprice is a 305 also and its a 5 quart capacity. so I'm goin out on a limb an guessing the 90 caprice is also a 5 quart capacity also. well my 86 caprice is a 305 also and its a 5 quart capacity. so I'm goin out on a limb an guessing the 90 caprice is also a 5 quart capacity also.
Not without modification
in the fuel tank, its like $90 at carquest