3.42 Posi

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3.42 Posi

Post by BK-75 on Sat Oct 31, 2015 3:50 pm

Just bought a 3.42 Posi out of a 73 Chevelle SS 454/ 4 speed part out car yesterday.

Quick pic after a few hours scraping/cleaning/ pulling rusty bits off. Bonus was the finned ET diff cover, kinda like ones that came on the Baldwin Motion cars.

Need to get some new rubber upper bushings, brake lines and paint.  Any thoughts on a rear disk conversion?



Should be a big improvement over the 2.56 open that's in there now Very Happy
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Re: 3.42 Posi

Post by pila on Sat Oct 31, 2015 11:15 pm

Are those 9.5 inch brakes, or 11 inch ? Nice ratio ! I'm usually OK with the 11 inch brakes, but the 9.5 inch seems a bit small for performance driving. Disc brakes would be a great up-grade of course....

Bill

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Re: 3.42 Posi

Post by BK-75 on Sun Nov 01, 2015 10:53 am

They are 9.5's

My options are swap the current brakes over, upgrade to 11 inch drums or do a disc swap.

I was thinking about this setup-http://getdiscbrakes.com/drop/Instructions/AFXRD01_AFXRD05.pdf

I would love to see a notable improvement, but still build a package on a budget.
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Re: 3.42 Posi

Post by clanceman427 on Sun Nov 01, 2015 11:38 am

Nice score! Is there more parts available on this parts car???
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Re: 3.42 Posi

Post by BK-75 on Sun Nov 01, 2015 2:54 pm

Kevin,  I know he still had the swivel bucket seats, some interior pieces, front Clip, doors, glass and all emblems.

Told him about the site, but not sure if he checked it out.

http://hartford.craigslist.org/pts/5267288185.html
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Re: 3.42 Posi

Post by clanceman427 on Sun Nov 01, 2015 6:21 pm

Cool, thanks for the link!
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Re: 3.42 Posi

Post by 77mali on Sun Nov 01, 2015 7:30 pm

Couple rear brake upgrade kits. There are others out there too.

http://www.spohn.net/shop/1973-1977-GM-A-Body/Drivetrain/Rear-Ends-Components/Moser-Engineering-11-Economy-Rear-Disc-Brake-Kit.html

http://www.spohn.net/shop/1973-1977-GM-A-Body/Drivetrain/Rear-Ends-Components/Wilwood-Dynalite-Pro-Series-Rear-Disc-Brake-Kit.html
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Re: 3.42 Posi

Post by jerry46765 on Sun Nov 01, 2015 7:56 pm

BK-75 wrote:They are 9.5's

My options are swap the current brakes over, upgrade to 11 inch drums or do a disc swap.

I was thinking about this setup-http://getdiscbrakes.com/drop/Instructions/AFXRD01_AFXRD05.pdf

I would love to see a notable improvement, but still build a package on a budget.


I have used 'The Right Stuff' detailing and most of their stuff is ok. I just had a minor problem with a simple 'right stuff detailing' fuel line (from pump to carb) that was bent incorrectly, obviously bent incorrectly, and they had no idea what to do. I finally stopped calling to get a resolution because they were not going to provide one. The tech guy kept saying, it looks just like the other ones in the package we have here. Duh, they are bent incorrectly too. So just a word of warning, don't expect any in-dept support if there is an issue. That reminds me, need to package up fuel line and ship it back...

Thanks -

Jerry
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Re: 3.42 Posi

Post by impalamonte on Tue Nov 03, 2015 11:16 am

BK.....
Over the summer I purchased the exact rear disc brake conversion kit from "Get disc brakes".

See some pics here at the end of page 2. http://www.g3gm.com/t8709p15-update-1973-monte-carlo-body-off-frame-resto

I had some issues with the conversion. I can say that the "brake " side of business.....support was "A1" !!! Two tech guys there really dug in for me.

I can talk you through some things you may run up against.

May help in your decision.
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Re: 3.42 Posi

Post by brownbomber77 on Tue Nov 03, 2015 2:02 pm

I thought the blazer rear discs were an option. Or even 4th gen camaros.

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Re: 3.42 Posi

Post by thatfnthing on Tue Nov 03, 2015 2:23 pm

I know late 3rd gen rear discs are an option, they did it in Car Craft. But Impalamonte did the math on it and by the time you track down all the parts you can use and replace the consumables like rotors and pads, it comes out to about the same amount of money and more effort than just buying the aftermarket kit. So as an experiment I could see it, but it's not as cost effective as the new kit.
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Re: 3.42 Posi

Post by BK-75 on Tue Nov 03, 2015 8:53 pm

Impalamonte PM sent.

I did consider pick and pull route, but your correct it just as cost/ time effective to just buy as a kit.


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