Optional Opamp for this buffer ?

[HOTTUBES]

I built this buffer circuit today thinking i had some TLO72 on hand , but i do not !!

What are some other op amps that will work nice here ...

I do have a few BB OPA2134 here ? I'm thinking these would work , but a bit expensive

[rockhorst]

Any dual opamp with the same pinout...check datasheets for that. Quick answer: yes the OPA will be fine (but consider ordering 10 072s instead off the OPA )

[anchovie]

Not all dual opamps have a JFET input like the TL072. You'll need a chip with this for a similarly-high input impedance.

[rockhorst]

Good pointAnchovie. I was mainly trying to say that he won't wreck his OPA. Whether it sounds good is another thing. Also, don't. Try a NE5532 (on of those other popular substitutes in stompboxes): is not designed for straight feedback and unity gain (though possible).

[HOTTUBES]

When looking up the specs of op amps , what am i looking for ?  ( Sorry Noob Question !)
Also , does op amp stacking help in this circuit ?

[merlinb]

When looking up the specs of op amps , what am i looking for ?  

As far as guitar is concerned you're mainly interested in whether it has FET input (=high input impedance) or BJT input (less high input impedance). Current consumption may also be important if its battery powered.
It may also need to be unity-gain stable, but most opamps that you're likely to encounter are.
TL0xx, 4558 and 5532 cover just about every eventuality.

Also , does op amp stacking help in this circuit ?

No. Opamp stacking doesn't help in any circuit- opamps don't like being stacked. That's just something circuits benders do when they don't know what else to mess with.
You can use separate opamp circuits and connect the outputs together via isolating resistors to get extra-low output impedance, but you never need that kind of extreme performance from a guitar circuit.