I have a 228/224 cam for my 4.8 and 4.56 gears. I am waiting for the 3600 stall to come in to install it. Everyone says it's too big....but screw em. With a good stall yours should be just fine.

 

Yeah I was told the same thing when I bought the 224/224 for mine, but I dont hear much from anybody about it being to big now...
it was a bitch to finally get it tuned but I got it there. and it runs really good now..

I also see blue's view....
the EXcab is going to be heavier..
I believe you could see the same gains as I did, but you will have the added wieght of the truck holding you back...

 

mine runs pretty well to after a good tune....i do not have my 3k stall in yet, that i will leave for this winter as well as beefing up the tranny....

 

what would you guys suggest for a 05 yukon with a 4.8

 

216/218
but you didnt really specify what you want.
I would assume with it being a Yukon you arent wanting anything really radical..

the one listed above would net you some nice gains, and still be easy to have tuned.

 

i want it to sound like my 224/224 112 did in my TA, i really dont care about power that much, im more concerned with the torque curve, mainly for towing etc...