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Old 07-30-2012, 03:28 PM   #1
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Default doug nash 5 speed

any way to mate a bbc to chrysler input shafted doug nash.
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Old 07-31-2012, 11:44 PM   #2
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Default Re: doug nash 5 speed

yes there is.
I have mated a chrysler 833 4 spd to my BBC.
I used a 12" thick adapter plate between the chevy bell, and the 833
I cut the input shaft down in length to the chevy length + 1/2"
I drilled out a bronze chevy pilot bushing to the dodge pilot diameter.
My setup was not perfect, but it can be, if you make your adaptor plate locate the input of the trans correctly, mine was out .025". I might also have a machine shop cut the input to length and cut the pilot to chevy diameter if I were to do it again instead of using a cutoff wheel and drilling the bronze bushing.
The 1/2"- 9/16" adapter plate is necessary to keep the input disc splines from bottoming out on the disc hub.
hope that helps
Barrett
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Old 08-01-2012, 05:51 AM   #3
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Default Re: doug nash 5 speed

Thanks barrett. I thot i heard of that being done before.
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Old 08-01-2012, 08:20 AM   #4
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Default Re: doug nash 5 speed

I was told the input shaft is ready for chevy pilot bearing. So i should just need mopar clutch disc.
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Old 08-01-2012, 09:47 AM   #5
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Default Re: doug nash 5 speed

my Nash has chevy input length and pilot diameter, and 18 spline chrysler splines. I simply use an 18 spline disc.

If your Nash has chrysler input length, you will need to adapt.
I beleive Mcleod also makes a scattersheild with the correct bolt pattern, depth and bearing retainer register to mate a chrysler 833 to a chevy, so you could use that to adapt if your Nash has chrysler length input.
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Old 08-01-2012, 12:18 PM   #6
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Default Re: doug nash 5 speed

Did urs come like that or did u have it made chevy length
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Old 08-01-2012, 01:17 PM   #7
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Default Re: doug nash 5 speed

Mine had the Chevy length/ chry splines when I got it.
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Old 08-01-2012, 02:32 PM   #8
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Default Re: doug nash 5 speed

Thats what i think this one is comes with chevy blowproof and chrysler cluth disc.
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Old 08-01-2012, 10:01 PM   #9
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Default Re: doug nash 5 speed

All race Nash's came with chrysler spline, but the pilot dia/length denoted what it fit. Mine was SBC when I bought it. I welded up the pilot and recut it to fit my Ford. Simple. Done a few for guys.
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Old 08-02-2012, 05:01 AM   #10
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Default Re: doug nash 5 speed

Thanks battlestar thats what i needed to know. Tryin to get some info before i purchase one. Thanks for everyones help.
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Old 08-02-2012, 09:07 AM   #11
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Default Re: doug nash 5 speed

We all run a chrysler spline disc.

When buying a Nash, look for the newer case, with the the socket head bolt through the lower middle of the case. That is the lower bearing support on the cluster shaft and that is much better then the early design without it.

What kind of clutch are you planning on getting? Maybe we can help steer you in the right direction. Doing it right from the beginning will help from problems later.
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Old 08-02-2012, 03:35 PM   #12
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Default Re: doug nash 5 speed

Is the bolt thru the case or on one side or the other?
This one I'm looking at has a lakewood blowproof a hays clutch and pressure plate.
What would you suggest for BBC 427 pump gas, 630 lift soild cam, 70 Chevelle.
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Old 08-02-2012, 11:55 PM   #13
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Default Re: doug nash 5 speed

It's through the case. I don't have a outside shot handy(this is a street version I just fixed for a friend):


But you notice the 3/8" bolt hole below the cluster shaft(under the bearing). The socket head will be on the passenger side of transmission. The early cases didn't have this and it is better to have it. It keeps the lower shaft from deflecting downward.
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Old 08-03-2012, 12:25 AM   #14
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Default Re: doug nash 5 speed

Battlestar,how much power will a trans like that hold ?
I am looking for something to last behind a 496 Olds in my 70 442,99% street driven,640 HP with a 3.73 gear.
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Old 08-03-2012, 04:57 AM   #15
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Default Re: doug nash 5 speed

Thanks battlestar I will check that out. Cant see that low on the case in the pics he sent me.
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