Okay, guys, I wonder if I can get a little help with this. My PO swapped out the '73 flat top carbs for a set of '72 round top SU's. But instead of reinstalling the original linkage, he left it completely unassembled (in a box) and cobbled together a cable linkage assembly. It's pretty crude, but seems to work okay. I've been rummaging through the spares box and made an assessment of the parts, not all the parts are there. So I've been looking through the gallery photos as best I can to try to recreate what/how it's all supposed to work. But I do have a coule of questions I just cant figure out on my own: (see photo - sorry to who's ever photo I used as it's obviously not my car)

Circle #1 - I have this lever part, and I believe what is the plastic bushing. It looks as though the only missing part is an E-Clip. Is this correct? Does it need two bushings (top and bottom)?

Circle #2 - This entire rod appears to be missing. This is the rod that attaches to the same lever piece in the engine bay, and to some part of the gas pedal assembly on the inside... strike that. Just got up under the dash and it looks like he kept the ball end on the pedal assembly but cut the rod and attached the cable there. Pretty slick. Ztherapy for this rod?

Circle #3 - I have both of these pieces, as well as the bushing type piece that goes between the two nodes on the intake manifold. What I do not have, or cannot determine is what additional pieces are needed at this junction. The J-shaped rod slides down into the two prongs of the other piece. This J rod has a small hole drilled in it, which looks suitable for a very small cotter pin(?) but that leaves a ton of slop in the linkage. Is it possible this needs a washer with spring assembly (then the cotter pin)?

Last but not least, I'm missing the throttle stop screw and spring, as well as the final rod connecting this linkage to the actual carb linkage. ZTherapy has these maybe?

I guess lastly what I'm wondering is why he would have gone through all the trouble to make a cable linkage when most of the parts look like they're all there? Am I missing more parts that I'm not aware of?

Which brings up another question:

Circle #4 - the fork looking piece threads thru the two holes of the intake manifold. Between these two nodes of the intake, the fork piece is also threaded thru a center "collar" type piece (where the final rod is attached. The fork piece is drilled in alignment with this collar piece - what goes thru the hole? It's not threaded yet looks way too large for another cotter pin.

well, the only question that i can answer right off the bat is about the cotter pin... yes, there is a washer and a spring to take up a lot of the slop. as far as the rest of the questions go, PM bruce palmer. the Ztherapy folks know their sh!t

thx Jason. I figured before I called them, ya'll would straighten me out and I could find out if my description was making sense.

It's been a long time since I dealt with this issue, but there was something different between the types of linkage for Flat Tops, and what was needed for Round Tops when I did a switch on a 1973 Z car that I used to own.

I *think* it was related to the length of that "J" shaped linkage rod, and the linkage on the balance tube had to be compatible with the linkage between the 2 carbs.

ZTherapy is a good place to ask questions.