Carb swap questions

No, the linkage is different. If you can't find slant six 2 bbl kick down linkage, you can buy a cable setup from Bouchlon Performance, or Lokar. Or do like I have done, and make your own using a motorcyle brake/clutch cable.
PS: I have also seen some less expensive cable setups on ebay

PPS: Here you go.

http://www.ebay.com/itm/GEARHEAD-CH...Parts_Accessories&hash=item5d35b05642&vxp=mtr