New tank in, easy install but the key is making sure the marked holes are large enough so that you have some wiggle room. Really a nice tank, fits like a glove and I really like the sump area where the output/return are located.
Workspace is tight but it can be done, reminds me of Tetris!
Also got the rear dropped 6 inches, another easy install. For the rivets just grind them down, I tried drilling and it was worthless. It's hard to see the significant drop without the bed but its LOW!