1988 C1500 305 to 6.0

Fixing to get started on my swap gonna get started on my swap I've got a 01 6.0 with a 4l80e I'm going to use the truck had 235k miles on it is there anything particular I need to look at it runs great no knocks idles smooth. I've never had an LS before so kinda green any help would be greatly appreciated. Also fixing to order my engine I've read about needing to adjust the engine one direction or the other looks like the dirty dingo is the way to go what about mounts for the trans? Thanks so much looking forward to talking with you guys