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Old 10-12-2013, 12:22 PM
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A-body swap to G-body?

So i have a 87 Monte Carlo SS and im running a mild 454 sooo this 7.5 wont cut it. I read up and found that iceman has upper control arms for a 64-72 a-body to a 78-88 g-body. My question is are those the only things you need for the swap? Are the shocks and springs moved around or is it basiclly a straight bolt on once you hook up the upper control arms? Also will my stock lower arms work or do those need special swap one too?

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Old 10-12-2013, 12:34 PM
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Quote:
Originally Posted by 454montecarloSS View Post
So i have a 87 Monte Carlo SS and im running a mild 454 sooo this 7.5 wont cut it. I read up and found that iceman has upper control arms for a 64-72 a-body to a 78-88 g-body. My question is are those the only things you need for the swap? Are the shocks and springs moved around or is it basiclly a straight bolt on once you hook up the upper control arms? Also will my stock lower arms work or do those need special swap one too?
This question comes up a lot. Aside from the control arm geometry differences, the A-body rear is 1.5" to 3" wider, depending on the year. Also, I don't know how things are where you live, but here on the east coast, desirable A-body axles sell for stupid money. By the way, do NOT be mislead by people selling "12 bolt" Cutlass/442 axles. These are NOT Chevy 12 bolt axles, despite the fact that the cover has 12 bolts. The ring gear is only an 8.5" held by ten bolts.
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Old 10-12-2013, 12:34 PM
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moving to suspension.... not sure why it was in transmission forum
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Old 10-12-2013, 01:03 PM
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Originally Posted by joe_padavano View Post
This question comes up a lot. Aside from the control arm geometry differences, the A-body rear is 1.5" to 3" wider, depending on the year. Also, I don't know how things are where you live, but here on the east coast, desirable A-body axles sell for stupid money. By the way, do NOT be mislead by people selling "12 bolt" Cutlass/442 axles. These are NOT Chevy 12 bolt axles, despite the fact that the cover has 12 bolts. The ring gear is only an 8.5" held by ten bolts.
Well that doesnt bother me at all, i actually was going to by spacers so the wheels would stick out a little so that eliminated something off my list lol. But other then getting those control arms do you know if the springs and shocks will be a direct bolt and placement?
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Old 10-12-2013, 01:04 PM
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moving to suspension.... not sure why it was in transmission forum
Well i posted it up on here because it said transmission and rear end but thanks, Im new to the forum.
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Old 10-12-2013, 02:25 PM
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moser makes a all new 12 bolt for the g bodys
no mickey mouse links needed
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Old 10-12-2013, 04:13 PM
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Here is a guide I like to look at.
OLDSmobility.com - The 1967 Oldsmobile Cutlass and 442 Resource - A-Body Interchangeability

Lots of good info.
I like the Moser suggestion. You can get a bare housing for a 9 inch ford carrier for under a grand.
Strange also makes the same/similar thing
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Old 10-12-2013, 04:15 PM
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More good stuff
Rear End Widths
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Old 10-14-2013, 08:51 PM
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Originally Posted by 454montecarloSS View Post
Well i posted it up on here because it said transmission and rear end but thanks, Im new to the forum.
Apologies , at the time I felt the question was more suspension related for bolting in different OEM rearend into your car. Not many OEM options for your application.

i would suggest a new thread in trans - rearend forum about a stronger replacement differential for your car. It has been discussed multiple times in the T & R forum.

I own a base level 1983 Monte Carlo, 305 , T-350. Been in the family for 20+ yrs. I like the car, even with 238k miles on it. It has been maintained well , it is not a hotrod, just a good looking , driving car
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Old 10-14-2013, 09:28 PM
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Quote:
Originally Posted by 454montecarloSS View Post
So i have a 87 Monte Carlo SS and im running a mild 454 sooo this 7.5 wont cut it. I read up and found that iceman has upper control arms for a 64-72 a-body to a 78-88 g-body. My question is are those the only things you need for the swap? Are the shocks and springs moved around or is it basiclly a straight bolt on once you hook up the upper control arms? Also will my stock lower arms work or do those need special swap one too?
Is it going to see slicks? Or even a DR at a track?
If the answer is no then you can upgrade your 7.5 to handle a mild BBC on street tires....
With good parts they can take more then most people give them credit for,
Or swap in an 8.5 G-body rear and save your money.
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