While building my WM T-34 ARF, I noticed the the engine seems to have a bit of right thrust. Is this correct or did I just install it crooked? Also, one side of the fusalage near the engine seems to be straight, while the other side has a curve to it. Any thoughts.

3 to 5 degrees is the norm, it's built-in to the firewall. I've built 5 of these things so just assemble as per instructions and it will be perfict.
Which engine?

OS .46 FX

That's the most common engine used, I have a OS 50 sx on my present T-34, it hauls.

I chose the .46 because I was told that if I ever wanted to race it, that is the engine you must have. Also, the guy at my local shop told me that with that engine and a 9.5x8 prop, it would do 113 MPH