want to put a 5.3 in my 92 yukon

[1984 t type]

my engine has a knock and rather than getting a reman i figured i would just grab a 5.3 and mate it up to my current trans. so im wondering if anyone knows what motor mounts, headers or manifolds, oil pan and other ls swap related parts will work ? i know that some of you are itching to say it and yes i tried the search feature, the thing is that almost all of the 92 and up swaps im finding are 2 wheel drive and mines is a 4x4. even when i look up the swap headers for the gmt400's they say 2 wheel drive only, so if someone can point me in the right direction that would be great. also when i was thinking about doing a ls swap in my 85 4x4 suburban i was told that i would have to buy an aftermarket front crossmember to make it fit, is that the same with a 92? thanks for any help