Dude That's a bummer with the warranty. Can't blame you for not trusting something that doesn't come with some sort of warranty. If it makes you feel better in a way King only offers 90 days on anything they sell, custom lenght or not i believe. I have yet to find anybody in any forum complaining about something that went wrong with Kings, i'm sure they're out there as nobody is perfect though, but it's not something you have to worry about much, at least witjh King, though i've also ran Icon before (1 year warranty) and Radflo (1 year warranty) and never had to use it.
Ask Nick for this Fox part# 883-24-024, This are Fox 2.5 shocks for the 2013 RAM 2500 and below, same mounts we have, plug and play in your 4th gen 1500
29.39" extended, 18.25" compressed so you won't even have to touch your bumpstops.
https://www.ridefox.com/product.php...&make=Ram&model=2500+&year=2013&position=Rear
TJAZ is running even longer ones, perfect fit, perfect valving see here:
https://www.ramforum.com/posts/2000587/
More expensive yes, you'll only pay once cry once.
As far as your question the 27" Icons will work, but I can't let you loose 3" of travel for a simple warranty
You’re making me rethink going with 29" Kings in the back and those Superlift springs.
Can you measure your rear fender-ground distance? you have 35's right ?