BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
 
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 Boxy bolt pattern question

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MASShole9C1

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Join date : 2009-12-16

PostSubject: Boxy bolt pattern question   Fri Feb 03, 2012 9:47 pm

maybe this will learn some others something too.

Question: Did 80's/1990 9C1's have a 5x5 bolt pattern and civi ones had the other... 4.75... I think? I can't find anything on the web about it.
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Matt Trakker

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PostSubject: Re: Boxy bolt pattern question   Fri Feb 03, 2012 10:07 pm

the only 77-90 Chevrolets that had the big bolt pattern were the 9c1 and the wagons. Everything else was the 4.75 bolt pattern I believe, including cars that came with F41 suspension or whatever, although I could be wrong on that.

This goes for other 77-90 B-bodies as well. 77-84 C-bodies/85+ D-bodies were the 5x5" bolt pattern though.
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M.ROSS

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Location : So.Portland/ME

PostSubject: Re: Boxy bolt pattern question   Fri Feb 03, 2012 10:26 pm

Not sure about the years. but it used to be 5 by 5 for 9c1s and station wagons.
4.75 for civies.
My 89 9c1 was 5 by 5 .I remember not having many wheel options.
My 78 aerocoupe caprice was 4.75 on the front and 5 by 5 on the rear.
The rear came out of a station wagon for the gearing and sway bar.
I had keystone classics with the old oval washer that you could flip for different bolt patterns.

It took me so long to type this that Matt already answered your question . Rolling Eyes

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MASShole9C1

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PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 12:17 am

Thanks for the clarification guys! I'm getting pulled back in the boxy lane. So I seek knowledge. My cars are too old tho. I dont think I can own anything older besides the Monte until I at least own/pay a mortgage for a house.
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Machine-De-Zine

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PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 10:22 am

Another worthy subscriber and affiliate in the "Boxy World"!

Welcome, brother!

On bolt patterns:

Usually, if not always, only the 9 passenger wagons got the big bolt pattern.

Those cars (three seat wagons) very often had Bendix Hydroboost brakes too!

The 5x5 B/P was always part of the big brake option, 12" front rotors, & 8.5 9C1 HD rears with large drums.

Regular wagons with no rear (3rd) seat, LO3 (305) engine, no HD towing Pkg or police duty wagon, had 5 on 4.75".
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Matt Trakker

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PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 12:31 pm

How rare would one of those 5X4.75 wagons be? I've never seen or heard of one.

In a related matter, does anyone know what year GM started putting Olds 307s in all of the B-body wagons?
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1984twodoor

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PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 12:38 pm

Machine-De-Zine wrote:
Another worthy subscriber and affiliate in the "Boxy World"!

Welcome, brother!

On bolt patterns:

Usually, if not always, only the 9 passenger wagons got the big bolt pattern.

Those cars (three seat wagons) very often had Bendix Hydroboost brakes too!

The 5x5 B/P was always part of the big brake option, 12" front rotors, & 8.5 9C1 HD rears with large drums.

Regular wagons with no rear (3rd) seat, LO3 (305) engine, no HD towing Pkg or police duty wagon, had 5 on 4.75".

They're the best ones! cheers

I think your question has already been answered so I wont even bother typing it again.
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MASShole9C1

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PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 1:21 pm

Machine-De-Zine wrote:
Another worthy subscriber and affiliate in the "Boxy World"!

Welcome, brother!

On bolt patterns:

Usually, if not always, only the 9 passenger wagons got the big bolt pattern.

Those cars (three seat wagons) very often had Bendix Hydroboost brakes too!

The 5x5 B/P was always part of the big brake option, 12" front rotors, & 8.5 9C1 HD rears with large drums.

Regular wagons with no rear (3rd) seat, LO3 (305) engine, no HD towing Pkg or police duty wagon, had 5 on 4.75".

Im not new to box Caprice's at all. I owned the following:
1979 2 door ??? v6
1985 4 door 262 v6
1986 2 door 305 v8
1987 4 door brougham 305 v8
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Matt Trakker

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PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 2:52 pm

1984twodoor wrote:
Machine-De-Zine wrote:
Another worthy subscriber and affiliate in the "Boxy World"!

Welcome, brother!

On bolt patterns:

Usually, if not always, only the 9 passenger wagons got the big bolt pattern.

Those cars (three seat wagons) very often had Bendix Hydroboost brakes too!

The 5x5 B/P was always part of the big brake option, 12" front rotors, & 8.5 9C1 HD rears with large drums.

Regular wagons with no rear (3rd) seat, LO3 (305) engine, no HD towing Pkg or police duty wagon, had 5 on 4.75".

They're the best ones! cheers

I think your question has already been answered so I wont even bother typing it again.

I'm seriously considering selling my white one and getting a box body lately. I want something "different" but I can't really spend the money on an SS no matter how I crunch numbers without selling my '74. lol
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MASShole9C1

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PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 5:57 pm

I know where there is a decent boxy that has been modestly detailed/modded. Comes with Monte SS rims and some other looks like 18" rims. Last time I knew he wanted around 3k for it. But its been in his driveway for almost 3 years. Desperate salesman maybe. If anyone wants pics. I'll get some tomorrow. Might not be a bad ride. The guy really liked the car when he drove it everyday. I guess he needed a more practical DD. I dont blame him.
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Cadet57

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PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 6:12 pm

Off topic... But there were box police pack wagons? COOOOOOOOOL lol!
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PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 6:32 pm

Cadet57 wrote:
Off topic... But there were box police pack wagons? COOOOOOOOOL lol!
Yes. Arrow
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MASShole9C1

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PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 6:35 pm

Cadet57 wrote:
Off topic... But there were box police pack wagons? COOOOOOOOOL

I actually have some pics of proof in my "archives". One is a mass state k-9 I believe! May also have been a CV wagon. I'll look.
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1984twodoor

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Location : Wilmington/Wakefield/Andover

PostSubject: Re: Boxy bolt pattern question   Sat Feb 04, 2012 11:36 pm

MASShole9C1 wrote:
Cadet57 wrote:
Off topic... But there were box police pack wagons? COOOOOOOOOL

I actually have some pics of proof in my "archives". One is a mass state k-9 I believe! May also have been a CV wagon. I'll look.

Patiently waiting for these pics bounce
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