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PostPosted: Tue Aug 11, 2026 12:10 am 
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EFI Slant 6
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Joined: Tue Aug 19, 2003 3:52 am
Posts: 321
Location: Helsinki Finland
Car Model: 1966 2D Dart
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Here it is!

Long time ago when I got bought a supersix setup including cast iron 2 bbl manifold and Carter BBD from a donor car I dint pick up the kickdown linkage. As it was Aspen it probably wont fit to my early A-body either.

So I had manifold installed and carburetor tuned, engine was at drive condition but I havent a kick down system. I had to build one!

I went to closest hardware store. I picked up a 8/10mm aluminum tube, couple of expanding wall plugs with M6 threads and couple of brass rings with 10 mm hole. Those are used at waterline copper tube joints. I also bought M6 threaded rod and 2 ball ends. Then I collected the system presented in the picture.

The left end in the part is for carburetor. Right end with bent rod is to A904 link. At first I screwed the bottom end to the 904 link. Next I measured the max movement from idle end of the 904 link to the "kickdown" position. Then I drilled to carburetor a hole (with some calculations and tests) which made similar but slightly less move from idle to WOT. You can see I have 10cm treaded area for adjustment. I used it so that when carbutetor is at WOT the 904 link touches to end.

I was ready from beginning.

Does it last long?

Yes it does. I built this system at 1999 and it is still in use. Now I have fuel injection but the throttle body shaft is at the same point as was the Carter was before.

This was and is my solution for kickdown of SUPER SIX.

_________________
1966 Dart. 170 cu.in. 200 rwhp. 101.6 MPH @ 1/4 mile.


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PostPosted: Tue Aug 11, 2026 7:01 am 
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Turbo EFI
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Joined: Mon Jan 12, 2015 5:55 am
Posts: 1461
Location: Brightwood, VA
Car Model: 1965 Plymouth Belvedere I, 71 Plymouth Scamp
Any pictures of this on the engine?

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-MattMan
LEANED & MEAN
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PostPosted: Tue Aug 11, 2026 11:16 pm 
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EFI Slant 6
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Joined: Tue Aug 19, 2003 3:52 am
Posts: 321
Location: Helsinki Finland
Car Model: 1966 2D Dart
Here it is with the turbo+efi setup. The rod was exactly the same with Carter BBD. I just chose/made hole to carburetor link which makes a little shorter movement to rod as the 904 lever does. Then I adjust the rod so that 100% WOT at the throttle pull the 904 lever to the end.

Image

_________________
1966 Dart. 170 cu.in. 200 rwhp. 101.6 MPH @ 1/4 mile.


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