8.5" rear end in a Hurst???

[motorholmes]

All over God's creation I find talk of the '85-87 442 having an 8.5 rear. But did the H/O have one? Or did it just have the 7 5/8 or whatever that was that the Monte SS had?

While we're at it, did the 442 or H/O ever have a 3.42 like the Regal GN or only the 3.73?

You guys love a little easy trivia don't you? I mean, I'm not asking about Bee Gees album names or anything...


P.S. All questions relate only to G-body years

 

[UnclesCamino]

I have heard the 84 H/O had an 8.5 in it. And I believe they all came with 3.73's.


Rob

 

[Furtrader]

I have heard the 84 H/O had an 8.5 in it. And I believe they all came with 3.73's.


Rob

That's correct.
The '83 H/O came with the 7.5.The '84 had the 8.5.
The H/Os and 442s came with 3.73s,the GN had 3.42s.

 

[Chevyman85]

Sounds good to me! An 8.5" and 3.73 gears is perfect. I'd like to get ahold of one of those cars. Thats good to know

 

[bigdan]

they are pretty hard to get ....

im still looking for one ,to put on my 84 cutlass project
unless i put my 95 impala ss diff under it & install 5.0" backspacing wheels
Dan

 

[Trends]

84 ss monte's iv had only had 3;42 7.5 in them...trunk sticker says gu6 for this rearend and gears ...from what i can remember only 1987 SS monte's ever had 8.5 rearends with only 3;73....and from all the montes iv had iv never had an 8.5 ....yet.

 

[Cutlassjim]

I also had a 7 5/8 open dif from a 84 SS that I put in my Cutlass that was 3.42.

 

[megaladon6]

monte's never had the 8.5, just the 7.625. 84 hurst olds, grand national's, gnx's, and at least some 442's are the only g-bodies to have the 8.5. what you can do is get a regular 8.5 and have the proper mounts welded on, especially if you are putting on floater style bearings.

 

[arocars]

Grand Nationals also used the 8.5

 

[85 Cutlass Brougham]

None of the Monte SS cars ever had a 8.5, all were either 7.5 or 7.625 10 bolts. All MCSS' with the turbo 350 ( first year or two) had the 3.42 ratio but the ones with the OD TH200-4R all had the 3.73. The later Turbo Regals ( I say this because the drivetrain was an option on all 2 door Regals and not just the GN or T-Type) all had the 3.42 axle ratio and 8.5 10 bolt. Early Turbo Regals ( Turbo 3.8's were available starting in 1978 or 79) used a different ratio and the 7.5 axle.

Interestingly, there were Turbo Monte Carlos as well that were available for a year or two in the early 80's or late 70's. There may have been other A/G body applications of the carburated turbo 3.8 as well since GM used turbo variants of the engine in a variety of cars including the FWD Riviera.

I am curious though, if anyone has tried to take a B body 8.5 and have it narrowed then added the G body LCA mounts. Would the UCA housing side mounts bolt to the G body UCA's? Then again, the whole process may cost more when it's done than just buying the G body axle assembly in the first place...