Im currently running teraflex long arms with currie upper arms and im considering to changing my setup to a 3 link from iron rock, what are the pros and cons besides the flex benefits ? Speed and stability wise ?

 

Couple things. It sounds like you have adjustable lower control arms but still short arms. Is this correct? And the IRO kit is not a 3 link.

 

No, they are adjustable long arms

 

I would go with a kit that does not involve an aweful cam adjuster for the upper. And either frame brackets, or a removable cross member.
Clayton, Full traction, Synergy suspension, Rock Krawler to name a few. Take your pic.

 

I have RockKrawler 3 link... Beefy as hell. Haven't installed it yet but I have heard really good reviews from other guys who ran it.

 

This^^^

 

If you already have long arms, why would you be looking to buy long arms?

 

To find a better setup than what I currently have! (Upgrade)

 

I have the IRO setup on my Cherocar and I love it. Don't believe the haters, especially the ones who have never even used the kit that they are bashing on.

 

a true 3 link would be an upgrade. preferably one with a belly pan

IRO would be a downgrade

 

I'm not bashing the IRO kit. This is what I think about it: If there are two different kits in the same price range, why would you buy the weaker of the two? Even if many run the IRO kit with no problems, wouldn't it be prudent to buy a kit that is stronger still? The IRO kit may work fine, but it's definitely a downgrade.

 

Weaker based on what?

 

What would you call it then?

 

Radius arms

 

The caster adjustment on the upper mount. Don't try and tell us thats as strong as a JJ or a heim. Why even chance it when you could avoid it?