91c is the designation for the police spec caprice.it should in most cases already have an lt1,lt1 is the motor,91c is the car specs, but since its a 91 it may be too old for the lt1 option, so that part i dont know.i just know for sure 91c is not a motor.
280
Police Package (9c1) had 5.7
you have to take the bottom steering column apart.
8 degrees before top dead center.
15"x7" w/ a 5x5 bolt spacing, sorry not sure about backspacing
with higher compression pistons
190 horse 350 tbi was available in the 9c1 caprice.
Top Speed of a 96 9C1 with LT1 engine...... 151MPH
Change the pistons, or change the cylinder heads, or mill down the cylinder heads.
Actually yes it will. Caprice/Impalas from 1977-1996 Share the same basic chassis. It will fit, also how do I know for a fact? I have a 9c1 rear end in my 88 caprice. Also just about any and all Suspension parts from a 91-96 caprice/impala will work with a 77-90 caprice/impala. However you will now have two different bolt patterns, unless you have a 80's 9c1 police package caprice which I believe did come with the same 5x5 bolt pattern as the 91's caprice/impalas
they may work i believe the mounts are the same but you will have to get 9c1 pads I know for a fact the 9c1 calipers are wider so the pads are different. also be careful as your rim may not mount properly because of the oversized caliper. 9c1s came with a different steel wheel then normal caprices.
remove the flywheel dust cover and check for cracks