05 E-fans, oil cooler

Plan on doing this next, what can you guys tell me about the swap, from what i understand 05s come with a bigger radiator that will bolt right in, as well as e-fans.

few questions
1. what 05+ trucks do these come in, 1500s 5.3? or just 6.0 trucks? i'm assuming 6.0s were the trucks with oil coolers not 5.3s?
2. how big is the bigger radiator?
3. ls1 fans are the same as the truck fans?
4. do the bigger radiators off the 05s have a drain plug, cause i'm kinda dissapoint i have to pull the lower hose off just to drain fluid...

My 5.3 has efans. I'd have to look, but I'm pretty sure I have a trans cooler and not an oil cooler.
 
So will the LS1 fans bolt up to the 28" rad? Sounds like they wont, but I wanted to verify.

Are you guys buying used LS1 fans from ebay? That's all I could find for $100-$150 range.
 
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