i currently have an 89 rs camaro, i been looking to get a psoi rear end or some 3.73 gear's , well i currently work with a good friend of mine who has a uncle that has a 1986 monte carlo. Now i asked him if it had posi rear end and what gears it had , he dont know so to test if it had posi i was gonna pull a little burn out but his dauter who crashed it ran the gas tank dry , so were going back later today when he puts some in.

i need to know if the rear ends its self are compatable , AE swap the gears or swap the rear end

i been looking on google for stock monte caro's to find what gears he has

i think my rear end is a 9 or 10 bolt the monte is an 8 bolt but the guy thinks it ha posi , i dont realy wanna go to my car casue its down the block casue some one stole my parking spot but far as i know its compltly stock and so is the carlo , it is a 4.3 v8 i believe

any help much liked , for 50 bucks for the carlo with front end damage its worth looking into , nothings majorly damaged and we have a 400 engine already lined up we planed on racing at te tracks with a th400 after we gutted toobed repaired and fix the frame (monte's know for there rear frame rotting away and this one is no different)

edited
searching some ebay for the year it turns out the 4.3 is a v6 so my douts are its not a good rear end i wanted

 

this has been answered many times, a search will net you more results than anyone will re-post....

- The monte rear will not bolt in. Only 82-92 f-body rears will direct bolt-in, 93+ will bolt in, but require different wheels to correct for the extra width. If your car is a 10-bolt, then the gears and carrier(posi) will bolt in place, but depending on year of both cars, the axles may have to be changed. Early model 7.5" 10-bolts had 26 spline axles, later model had 28. Depending on which each is, if your factory axles are the opposite of the new carrier, you will have to buy/find the correct axles. - If your car is a 9-bolt, then nothing will interchange. - There is no such thing as an 8-bolt.