is 3m double side tape the best?
if so where do u think i can get it
this is for isntalling A/F gauge
also waht wire do i need?
anyone knows?

Go to your local hobby shop that sells radio control cars. Tell them you need water resistant double sided mounting tape...the thick black gooey tape used to mount electronic speed controllers and steering servos on carbon fiber or graphite chassis. It's the best stuff I've EVER used! Think about it...this stuff is meant to hold a high accuracy steering servo on a 1/10 scale car that occasionally contacts the wall at 80 MPH...heavy duty stuff!

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I think I got the 3M tape from Napa. It works pretty good, but not sure if it's what you want. I used it for the Subaru grill emblem.
As for the wire, are you talking about the gauge? The instructions should say which gauge wire to use.

i use the kind that the use for replacing glass at the body shop i work at it some good stuff but i forget the name of it !!