in my eyes if you want a 64MHz Frequency you need to buy a 64MHz Xtal.
What I see in the datasheet is, that the XTALs up to 30MHz work on fundamental frequency (if you could use them as 3rd overtone ones, it makes no sense that you can buy 64MHz XTALs)
and XTALs above 30MHz are designed to work on 3rd overtone.
That is the important clue.
Overtone crystal oscillators always have a tuned circuit to peak the gain at the third harmonic, (or sometimes the fifth harmonic).
This is a pretty typical type of circuit:
Personally I would not bother, as you can buy 64Mhz oscillator module for less than a couple of dollars and be done.