Motor don't care which side the cables come from.
Don't take this the wrong way but I'd hate to see an old CC butchered because you're cheap, so I'm sure the collective here can work you through a good compromise of rigging you motor.
That said let me rephrase my first question from above - What does the boat have for steering now? What type of helm?
And I'll repost this because it truly helps to
SEE what you're working with.
Me from above said:
Above all just because we like pics round here if you can post some pics of what you're working with you'll likely get batter answers.
I'm no motor expert but I believe it's fairly simple to flip the cable steering to come from either side. The control box I'm not as certain about but I think it's possible. The control box issue may be better asked in the Johnnyrude engine forum. Another option would be to sell off the box you have now and go with an aftermarket control box.