FirstToy said:All the IFS long travel use uniball UCA's... I don't think it's a problem for street use (then again, maybe it's a don't ask/dont tell thing)
I'll spare you the long and sordid history, but suffice it to say that in the Jeep world heims, including the highest quality available, were tried extensively by major offroad manufacturers in the late '90's when the TJ hit the market. I only know of one who still uses them in control arms, and that is Skyjacker, and Skyjacker does all kinds of crazy sh$t. Johnnie joints are pretty much a standard.
The reason to use heims these days centers around load bearing. You see them in buggies, because at 1" or so the load ratings are unreal. You really can't compare solid axle control arms to IFS suspension components. There is nothing wrong with heims, but you'll be greasing them weekly and they are highly unlikely to last a lot of road miles. It's just a reality of the design.