RE: my cub flies a lil funny
On the engine, if it pulls hard to the left when the throttle is quickly increased, then you need more right thrust. However, with that big engine it's possible you already have too much right thrust.
Since the Cub is a flat-bottom wing, you can easily check for warps. Sight along the bottom of the wing from the tip to the root. You will easily be able to see if the bottom of the tip rib is in alignment with the root rib. If it is warped, try this. Gently twist the wing about the same amount in the opposite direction and re-shrink the induced wrinkles out of the covering.
If the wing is not warped, look to your controls and surfaces. Make sure the vertical stab is at right angles to the fuselage. This may be hard to measure and you may have to resort to a TLAR (That Looks About Right) system. Be sure your rudder is straight to the fuselage. Check the ailerons to be sure you have them level at neutral. Lastly, be sure the wing attaches at right angles to the fuselage.
Good luck with it.