The K-member should have all the proper holes already for a stock sway bar. Either get the factory LCA's with the sway bar tabs, or, get a kit that doesn't need them. The '68-up idler arm conversion is a nice upgrade if you aren't concerned about originality, but, the stock '67 will work fine. They just are an inferior design and don't last quite as long as the '68-up version. They're a lot more expensive too being a one year only part. Depending on the level of performance you desire, stiffer torsion bars, sway bar, and high quality shocks sure help in handling.
