It should tell you on the air conditioning unit but it's more than likely R12. I have an '89 Caprice and it takes R12.
Yes
R134
1,8,4,3,6,5,7,2 1,3,5,7 are on the left bank and 2,4,6,8 are on the right bank.
The 305 was standard in an 89 Caprice Classic, so the answer is obviously yes.
Yes
yes
A Caprice steering column can be replaced by another as long as it matches. It if comes from another Caprice of that year, it will fit properly.
r-12
The average amount of pounds a Chevy Caprice would take is 3 to 4 pounds. Freon is difficult to obtain and you have to know what you are doing to charge a car.
In a 89 Chevy caprice, your fuse box is located on the driver side under the emergency brake and trunk release switch.
Was built for R12, should be converted to R134a