In my time reading thru these posts I have noticed quite a few people talking about putting 4th gen rearends in their thirdgen. How hard is this? Does the rear just bolt right up? Do the 4th gen wheels need spacers or anything? My rearend needs to be redone, but if I can do this for the right price I could get rear disk brakes as a bonus. Any info would be great!

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1986 IROC LG4 "Bone Stock" (for now)

 

Yes, the 4thgen rear is a direct bolt on.
But it's about 2" wider on each side.
You can use your 3rdgen wheels with no mods, but they will stick farther out of the wheel well on the rear. Or you can use 4thgen wheels, they will fit ok under the rear, but will require spacers to fit properly on the front.

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Redbird
Bayou Motorsports
87 Firebird-Daily Driver/Autocrosser
84 Z28-Full bore Autocross car
Delta Region SCCA
#00 C Prepared

 

Redbird's right; the 4th gen rear is pretty much bolt-on to the 3rd gen cars except for the width; I'm doing one now with a buddy on his 92 Z.

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• 1997 30th Anniversary SS LT4 #74 with all SLP options and K&N, white gage faces, and Hotchkis shock tower brace - In process: SFC's
• 1996 Corvette Grand Sport LT4 #509 with K&N, Flowmaster exhaust, Hypertech power programmer, and Baer slotted/cross-drilled brakes - In process: SLP throttle body and 1-3/4" headers, AFR heads, 4.10 gears, custom Panasonic/Alpine/Audio Control/ADS audio system
• 2000 Chevy TrailBlazer

 

Can you keep me posted on how it goes so I can decide if this is something I want to do? THANKS!

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1986 IROC LG4 "Bone Stock" (for now)