Looking for assistance in installing a 4 speed C10

[Javac1953]

I currently have a 1969 C10 with a 3 speed manual tranny. not working well with the new 383 strocker. Need informqation on what it takes to put a 4 speed in it. I use this on the street, and also make a few passes with it a few times a year.

Not sure what model to look for. I am currently set up with a course shaft clutch wise.

Anyone has information from experiance, it would be greatly appreciated.

Javac

[LMREESE]

An sm420 is a pretty straightforward swap. You'll need to cut out your floor board and find a bolt in hump. I'm not sure you would want a granny four speed though. You will also have to add a cross member under the rear of the trans cause the bellhousing wont support the extra weight of the bigger four speed.
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[Javac1953]

Originally Posted by LMREESE

An sm420 is a pretty straightforward swap. You'll need to cut out your floor board and find a bolt in hump. I'm not sure you would want a granny four speed though. You will also have to add a cross member under the rear of the trans cause the bellhousing wont support the extra weight of the bigger four speed.
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I was looking more for a side shift, and not the granny 4 speed. Maybe a Saganaw? not sure what other options are available

[hayhauler71]

had a saginaw did not last look for a muncie 4 speed out of a chevy car

[54belair]

I am taking a 700r out of mine and installing a muncie 4 speed out of a 69 camaro.
I originally bought a saginaw----but if you are running a 383 the saginaw will be too light, especially if you going to play on the 1/4 mile.
You can use the tailshaft crossmember, no prob. Getting your clutch linkage to work with most headers is an issue and using a bench seat is a bit of a prob. (may have to fab. a shifter handle. Over all its a relatively easy Do.

[Javac1953]

This is all great information guys. With the3 speed already installed, the linkage challenge has already been addressed. Do you know if the 69 car Muncie is a course shaft? Will drive shaft length or splines become challenges?
Thanks
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[rustypu]

I have a M22 in my 72 SWB the drive shaft should be the same, and Most of the muncie 4 speeds had the 10 spline input whitch would also be the same. I bought a new crossmember from CPP and got rid of the old bell housing set-up. Hurst still makes a shifter and linkage for this change PN 3910002 for the shifter and you would need to know which model trans for linkage kit.

[geezer#99]

Here's some info on muncie's. Not cheap. Count on a couple grand by the time you're done swapping.
http://www.garagemotorsports.com/

[Boog]

If it's anything like my old 78 the swap is a breeze. I had a Muncie close ratio 4sp from a 69 Nova SS. The 3 ott in the truck broke. I rolled it in the shop and out of the shop in less than 3 hrs. It was a bolt in affair, drive shaft and all. I did have to cut the hole for the shifter and I modded the shifter to clear my bench seat rather than buy a truck shifter.
I sold that Muncie for 250 10 yr or so ago.

[Javac1953]

Thanks all for the infomation. It looks like i have some homework to do in locating the right Muncie. Other than that It doesnt sound as though this is going to be too difficult ofa task. I do see different ratios in the gears, any suggestings on which works best for both street and strip? I just put an Eaton posi in it and left the 373 gears as I want to not only get a decent ET, I want to do decent on the Hyway too.