Shawnlord

I have a 1966 Plymouth Belvedere that had a 318 poly motor and I am Replacing it with a 440 that came out of a RV. I bought motor mount and engine plates for the 440 bolt into the K member. When installing the motor the driver side goes in place like it should but,passenger side does not fit in the motor mount Passengerside a little higher making the engine not level.What do I do to solve this problem