K member setup

That K-member looks to be the '68-72 version. Should be a bolt in with the '68-72 idler arm. No other changes should be necessary. I doubt there will be an improvement in header clearance. Now when you get to the BBP brakes, you'll need to change the upper control arms too, or get the tapered adaptors and use your existing UCA's. If you're going to use the stock Kelsey Hayes brakes, just change everything from the spindles out when converting from drum.