Even if you beat the **** out of your engine, 60k is **** imo. There is no industry standard that states that, so don't cling to it too closely for convincing purposes.
80k is pushing it on the old stle tensioner, yes. Most people will agree that 60k is premature for engines that use the new style tensioner.

 

having the TB changed at 60k is only necessary for the 97-99's, 00 and above is a lot better and can be changed at 90k, or if you want, audi states 100k.

 

my best guess is fuel pump