Which 1971 engines came with the C6

[71-429Mach1]

I’m putting in a 429 and C6 in my 71 Mach 1 and wondering about the shifter linkage. I have a linkage from a Mach 1 but unknown if it was a C4 or C6 linkage. Wondering how common the C6 was or what the linkage for it looked like.

thanks!

 

[164runner]

might call perogie enterprises

 

[ArtBBQ]

I've got the C6 in my 71 351 Cleveland Mach 1

 

[rvrtrash]

I believe the 429 got the big block C6, the 351-4V got the small block C6, the 351-2V got the FMX and the rest got the C4.

 

[basstrix]

You could get a C6 with either a 429, 351c, and possibly other combos. Mine came with an FMX and I changed over to a C6. To the best of my recollection, I used the same cross member and shifter linkage. I needed a C6 kickdown rod. I was surprised that the cross member worked based on what I had read in various articles. I have a pdf of an article I saved from back in those days...I can email it to you or if the board is ok with it, I can post it to this thread....it's 5 MB, so kind a big?

 

[c9zx]

I think the Neutral Safety Switch for the 429 is located in the shifter housing and with the 351 it is mounted on the side of the transmission. I don't know if the linkage is the same or not. Good luck with the swap. Chuck

 

[Fabrice]

@c9zx On both my 429/C6 and 351/FMX, the rear light and safety switches are in the shifter assembly.
How does that work when mounted to trans? Activated by the trans lever? Never seen this.

 

[Hemikiller]

The M and Q codes in 71 received the C6, in addition to the 429s. In 73 you could also get the C6 behind the H-code 351-2V.

 

[c9zx]

Fabrice, It mounts to the transmission down shift lever. (Mustang with C4 and C6 except 1971 429. Chuck

 

[71-429Mach1]

Thanks everyone. Was considering using the stock shifter and center console with my 429/C6 but linkage rod is costly, if I can even find one. Might just be easier using the B&M shifter and cable.

 

[basstrix]

Thanks everyone. Was considering using the stock shifter and center console with my 429/C6 but linkage rod is costly, if I can even find one. Might just be easier using the B&M shifter and cable.

Hmmmm mine worked fine...went from H code FMX to M code C6 then to 429 C6 using the same shifter, rod, and center console.

Edit: I don't have the column lock linkage set up...is that what you're concerned with?

 

[mrgmhale]

Thanks everyone. Was considering using the stock shifter and center console with my 429/C6 but linkage rod is costly, if I can even find one. Might just be easier using the B&M shifter and cable.

If you can't get your oem trans shift linkage to work you can reach out to Lokar for a highly adjustable shift rod. I did this for a C4 > AOD swap where I wanted to keep using my oem shifter. The rod was every bit as adjustable as I could have wanted, Worked perfectly. I actually purchased it through Summit Racing. When in the Summit Racing site search on:

lokar shift linkage adjustable

https://www.summitracing.com/