Super six kickdown linkage
Lokar makes an after market throttle cable setup that can work. If you can’t find on the search on this site, check with the slant6 forum.
I was able to score the correct throttle bracket and rods off eBay. Took a long while, but someone finally posted what I was missing on there.
I don’t know if this helps, but here’s some closer pics of what will be needed.