View attachment 176086
This is what Chong Li tells me all the time. And he'd kick my azz if I did anything else. Anyway, your sutuation is one of those "depends" moments to me.
Sure, articulation is gained, plus adjustability for pinion angles as previously mentioned. Major plus points. And depending who you buy from, there's not much of a price difference, if any in some cases, between full poly bushed adjustable links and the heim joints. Coupons make it even better.
BUT- if you're needing the articulation, swapping rear ends or making your own spring heights, leave the line hooking up like a ****, and bowing that car up at the starting line like a bull ready to blow his load, then by all means, go for the swivel heads. If you're trying to make it a handler, you'd already have all this anyway.
If you're going to stay stock, or even with slightly warmed over drivetrain, the car isn't going to GAF about 1/2 degree pinion angle difference from a poly-bushed non-adjustable arm. Or even new stock rubber-bushed ones. Also you may experience a little more vibration with the articulation type. But nothing a tad more volume on the radio won't fix. Although, it seems like it would be a solid piece for sure.
I think you're just trying to justify the heim joint purchase to yourself. It's only money, you can't take it with you, but it seems you've already made up your mind. Just buy the heims and hush.
🙂