Which engine for which plane
 

I have 2 planes that I am getting ready for next year.
One is a Cap airplane that was given to me that had a supertigre 45 on. I thought it was too small the Plane it needed alot of nose weight to balanse out.. It is 49inch length and 64 inch wingspan. There is no markings on it saying what maker just that it is blue green and white. The other plane is a Great Planes Revolver 70. The two engines that I want to use is NIB Supertigre 90 and OS 65 AX.. Not sure what I want to use..