Hi

I recently picked a GT Ruckus Flowta frame which I am building up. Pretty much have all the parts.
I put in the BB and put on the cranks, derailleur etc. and I see that the chainline seems to be at a very bad angle.

The cranks are FSA V-drive and the BB a truvativ Gigapipe SL. (got them from a friend who replaced his whole drivetrain). Why is there such a problem and how do I fix this, new BB with shorter spindle? Don't have the bike with me but I believe the BB shell is 73mm and the spindle 113mm.

Thanks
Dave