can i put 3;27 posi in that rearend or do i have to change my housing

 

The nine bolts are rare. They are not interchangable like the 1982-1987 rearend components with 1988 - 1992's. The 9 bolts are in a class of there own.

 

You don't have to change out your housing but you do need the 3 series carrier rather than the 2 series carrier you currently have. I've heard that a spacer can be fabricated to allow the use of 3 series gears with your carrier but I have no personal knowledge. Maybe someone who does will reply.

 

You will need a series 3 carrier. You can use your existing housing.

Miles

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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES,it is a 9 bolt & YES they are 3.73's, not 3.70. 4.11's to follow soon )
www.koolmeister.com

 

I am buying a 10 bolt from a friend of mine for $200. It will probably cost you less to go to a junk yard or look at e-bay for a used 10 bolt with 3.42s or 3.73s and put that in your car. You could then sell your 9-bolt and maybe even make a profit on the swap. Those 9 bolts are strong and rare and some people will pay some serious cash for them.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

Soon to Come: 7.625" 10 Bolt with 3.42s and Accel TPI Intake Base

 

I got a 3.27 gear, posi, 9 bolt complete with disk brakes (calipers and rotors) for sale sitting here in Calgary. Are you willing to pick it up or pay the shipping to Ontario? I want $500 for it.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.69
Best MPH on a time slip: 121.52 altitude corrected to 127.76
Altitude corrected rear wheel HP based on power to weight ratio: 504.5
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley