318 from 74 Van into a 68 Valiant

I found a 318 engine for my Valiant!!!!!!! The motor is from a 74 Van. Will I need to change or modify anything to get this motor to work in my car?

I know that right now I have to find a 904 that accepts the V8 since i had a slant 6 before. But I'm asking about the motor needing a oil pan swap or sump in the wrong place. Anything.

Before I drive 1hr and 30 minutes to go pick it up and find there is no way it will fit.