Backspacing and UCAs HELP!!!

Well guys thanks to Black Friday sales and your feedback I’ve spent a good amount of dough on some suspension upgrades from my 2” leveling kit.. but i think I’ve run into an issue!! I’ve been running 285/65 R18s on HD wheels with 0° offset and 5” Backspace for years with stock UCAs and i haven’t had a problem with the wheels rubbing on the UCAs

I purchased Icons Delta Joint UCAs which require a Max of 4.75” backspace
I was pretty fired up about getting these (got a good deal too) can anyone clue me in?? I think I’m going to have to change to light racing UCAs but i can’t even find specs on their backspacing requirements.. let me know pls

Edit: the order hasn’t shipped yet so I’d like to change it if need be I’d hate to run into the problem during install

 

I'd call Icon as I did when wondering if my tires or rims would rub and they gave me answers..
You might not need new UCA's
And the ones you and I have are really nice.

 

I just got off the phone with them... again.. Steve told me i was fine.. they are the same frames as the Unibal and they have a 5” backspacing requirement. I tell you what.. Icon has been great as far as technical support.. i was worried that the tires were going to rub on the arms.. but as far as they say I’ll be fine