The 93' caprice was not fitted with the LT-1. That motor was installed in 94 -96. The 93 uses a modified TBI 350 called the LO5( 2 bolt main 9.6 compression and around 205hp, 300 ft-lb torque so I hear). This engine has a mechanical distributor with computer advance, two injectors and for the 9C1 vehicles runs higher flow injectors, larger exhaust and a different cam/chip combination( I believe the 89'L98 cam?)
The trans is a 4l60( re-named th700R4) not the 4l60E in the Impala( which seem to have reliability issues- too much power maybe?)
The 93's used disc/drum brakes(check for JA2)
and the 94+ got rear disc.
I own a 93 lTZ that is similar to the 9C1 less the specific mods above. Parts are plentiful and cheap when and if you need them. Is the car rough or in good condition? G80 on the spid code is for posi that was available in the earlier models.
I like the car and have mods to the suspension,brakes, cooling( just in case), and am working on stereo and exhaust mods now. Just for fun.
What are they asking for the car? Picked mine up 2 yrs ago from a little lady with 17kmi. on it for $9800( a lot more for the $ than a Hyundai)
Hope this helps- Scott