C6 Conversion questions

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Jan 6, 2014 | 12:24 PM

dsrtjeeper

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From: Glendale, AZ

C6 Conversion questions

I'm pulling out the Cruisomatic this weekend and installing a C6. I have a few questions for those who have done this swap. The C6 I'm using is out of a 1970 F100 and has short cast tail housing.

Will speedo cable work on C6?

Will stock column detents work with C6?

Does anyone have a pic of linkage they used on tranny to hook stock shift rod to?

Thanks!

Jan 6, 2014 | 12:39 PM

ashleyroachclip

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your speedometer cable will work
the detent will be the same
I did this swap over 20 years ago , so my memory is a bit fuzzy, and I no longer have the truck.

You may need to change the gear to correct the speedometer accuracy.
the linkage from the donar truck will work , if you don't have it your existing linkage will work.

Jan 6, 2014 | 12:54 PM

PROSTOCK

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Joined: Feb 2004

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From: Central Texas

Quote:

Originally Posted by dsrtjeeper

I'm pulling out the Cruisomatic this weekend and installing a C6. I have a few questions for those who have done this swap. The C6 I'm using is out of a 1970 F100 and has short cast tail housing.

Will speedo cable work on C6? YES

Will stock column detents work with C6? YES

Does anyone have a pic of linkage they used on tranny to hook stock shift rod to? NO, BUT THE FACTORY LINKAGE HOOKED RIGHT UP (you are speaking of the gear select linkage, not the down shift rod, correct?

Thanks!

You will also need to likely shorten the drive shaft and relocate the tranny cross member. Mine has an output yoke for a u-joint, was not a slip yoke, yours may be different. I also have a 2 piece drive shaft, it's the front piece that I had to shorten. You will also need to figure out a tranny cooler. The original COM had the cooler mounted on the trans. I use a large aftermarket tranny cooler w/o issue. I don't remember if the COM used a vacuum signal or not, but the C6 does.

Jan 6, 2014 | 04:08 PM

TA455HO

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Joined: Aug 2012

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From: Seattle

Are you planning on selling off the COM and related parts? I could sure use the cooling lines that run to the tranny. I think the drivers side has a clip and bolt to hold the line on that side. My old 352 has the fittings on the sides of the block near the freeze plugs, but no lines came with it.

Let me know.

Thanks
Chad

Jan 6, 2014 | 05:31 PM

dsrtjeeper

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From: Glendale, AZ

Quote:

Originally Posted by TA455HO

The original owner did away with that system and installed an aircraft oil cooler up near radiator. I in turn did away with that oil cooler and ran hard lines to the radiator. Sorry.

Jan 6, 2014 | 05:33 PM

dsrtjeeper

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From: Glendale, AZ

Quote:

Originally Posted by PROSTOCK

I have the tranny yoke with 4 studs through a plate like what came on the COM.

Jan 7, 2014 | 06:55 PM

PROSTOCK

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From: Central Texas

Quote:

Originally Posted by dsrtjeeper

I have the tranny yoke with 4 studs through a plate like what came on the COM.

Same style, but there may still be a difference in u-joint sizes from one yoke to another. I ran into this but found adapter u-joints to solve this issue were easily available from NAPA. (1130 vs. 1330 or some such nonsense, it was a long time ago)

When I made the swap I just crossed my fingers and hoped the tranny would work. It did...for a while. I ended up pulling it and rebuilt myself. Not very hard to do if you're faced with the same issue. I also installed a shift kit while at it. Pretty much bullet proof after that. I also later added an adjustable vacuum modulator...allows you to further tweak the shift characteristics. You'll be happy you made this swap. Power disc brakes and power steering should be next on your list if they haven't been done already. Automatic, PS, PDB, R&H. What else do you need?