****** Not at Posted Coordinates *******

My friend from Mexico decided to drive up here for a visit and while he was here the subject of tap dancing was brought up. He said “did you know the real good tap dancers can tap dance backwards?” I said “that is just crazy”. He kind of lives back in the 1990’s so I just let it go as some dream he must have had and changed the subject.
A couple of days later, as he was driving back to Mexico, he texted me the following message:
Hey Rog, I hid that cache we were talking about and it is located at:
7777666366677782882226667773322277773377786666688666222664442226667778288222
33888338866666777332227777337778338883388666666688777733777833888338866
Bring your own pen.

You can validate your puzzle solution with certitude.