I went with 4.88s. Not sure about up there in NY, but I went to East Coast Gear Supply here in NC. I love the extra torque from the 4.88s. It feels like a completely different car. But unfortunately it really messed with the ECM. Now trying to get all the faults to go away (see my other thread here).I've been thinking of doing a rear gear swap to 4.56 in my 18 350. I'm apprehensive because I do not want any gear whine or rear end noise. Can anyone recommend a competent shop in Long Island NY to do the swap?