67 Barracuda- Brakes and suspension on a 5000 budget- advice needed

I would try to replace the 67 Kmember with a 68-72 v-8 piece

Funny you said that, I was just thinking about it. I don't have the ability at home to swap Kmembers, but I know of a shop that could probably do it. Plus I could paint it properly and maybe assemble some of the suspension before it goes in the car. Could you explain more about why the 67 only idler arm setup is so hated?