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Old 10-13-2005, 11:25 AM
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78 malibu rearend?

Hi gang,I have a 78 bu I am hotrodding,I would like to get some opinions on a rearend selection,keeping in mind Im on a budget.I will be running a 406 ci small block,making around 400 hp on motor ,and 600 or so on NOS.Powerglide trans. with trans. brake, and 28x12.50 M/T D.O.T tires.I am pretty sure a Buick Regal/T type and Hurst Olds/442 will work.Any suggestions will help...Thanks

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Old 10-13-2005, 12:39 PM
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With that kind of power, I would suggest nothing less than a 9" Ford rear.
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Old 10-13-2005, 04:15 PM
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I have checked with a couple of places and I can get a 9inch ford with all of the brackets and chevy bolt pattern with any gear I want for about 1300$.But man thats alot of coin!
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Old 10-13-2005, 04:47 PM
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mind telling where you found ford 9" for $1300 ? i was planing on building my own, but would like to look at some complete units.



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Old 10-13-2005, 05:41 PM
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Quote:
Originally Posted by evilone
I have checked with a couple of places and I can get a 9inch ford with all of the brackets and chevy bolt pattern with any gear I want for about 1300$.But man thats alot of coin!


But that's cheaper than tearing up 3 or 4 Malibu/GN rears .....
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Old 10-13-2005, 06:13 PM
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But that's cheaper than tearing up 3 or 4 Malibu/GN rears .....
I've seen the GN housing and axles with no carrier bring $800, not saying it's worth that but somebody thought so. For what your talking about building that $1300 sounds cheap to me.
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Old 10-13-2005, 07:27 PM
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my 406 is in the neighboorhood of 380hp and 440 ft lbs and im running on a stock 7.5" rear end in my 81 el camino and its taken a huge beating and its not failed me but when i was racing at the drags i did hear something but its still hanging in but that is on 275/60/15 street tires.... but the size of tires you plan on running a 9" is a must dont waste your time with the GN or 442 rear ends
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Old 10-15-2005, 12:31 PM
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Muastangsaly,I talked to Jeff at Sparker Racing Enterprises.The number Is 1-704-799-1300.They will be happy to help.They are in Mooresville,N.C.The reason I asked my original question is because I have ran across a 84 Hurst Olds rearend I can pick up for cheap.It should bolt right in and its already geared 373 posi!Any thoughts?
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Old 10-15-2005, 08:15 PM
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If it's cheap, it's probably either broken, or it's not an 8.5" unit. Last time I looked, good used 8.5's for that platform cost $1,000 or more.
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Old 10-15-2005, 08:51 PM
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Originally Posted by Deuce
But that's cheaper than tearing up 3 or 4 Malibu/GN rears .....
AMEN AMEN AMEN AMEN

If you have enough torque multiplication and enough traction, something has to give.
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Old 10-16-2005, 07:23 PM
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Granted, the 8.5" is still a 10 bolt, it is a tough 10 bolt. I am looking for one right now for my El Camino cuz you can't get hot parts for a 7.5". The GN guys must know something in order to keep them together. They manage to keep the rest of the car together. I would think done right the 8.5" would hold but you could probably have a 9" or a 12 bolt for the cost it takes to build the 8.5". Too bad South Side Machine went out of business, the used to sell a 12 bolt conversion for a G-body.
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Old 10-16-2005, 08:58 PM
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I have been running an 8.5 10 bolt for a while with no troubles. I have a 400 with around 450 hp and almost 550 ft./lbs. of torque.

I just got a nice 8.5 10 bolt from the local Pick and Pull lot for $40 yesterday. I didn't feel like doing a gear swap in my original rear so I just got a whole rear already set up.

I saw something online about how you can use 12 bolt axels and make a 30 spline early model 10 bolt. I was almost going to do that, but now that I found my rear on the cheap I think I am going to stay on the cheap. A big advantage doing that other than just the extra strength is that lockers and posi units are cheaper for 30 spline 10 bolts.
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Old 10-19-2005, 04:41 PM
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So what was the end result......10 bolt or 9 in?
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Old 10-19-2005, 06:35 PM
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well go go 9"
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