I need more information: 1) about the tree, I assume it's a conifer of some type, so if you have any clue as to what type of conifer it is that would help. 2) about where it's growing, how much sun does it get, what the natural climate/rainfall is like.
And as for 80ft in two years... hydroponics... "maybe"... but since we're talking 80ft here, it might be cheaper to just inject the thing with crack as suggested above.