LSx Valiant Build. Take a look inside...

Can you measure your crank bolt to the top of the K member? Also, do you know your current driveline angle?

TTI uses crank to top of K member and Crank bolt to each frame rail when measuring if the motor is in the factory location. Should be a good indication for your purposes, and will help you know how far you can go up (when combining that with drivetrain angle). More than likely you can go up