steering box replacement

Well, I am just about done with my 68 Barracuda. The only thing I did not touch on the whole car was the steering. I finally had an opportunity to run it up and down the road yesterday and you guessed it. I am not going to be happy with that steering. What are you guys doing to tighten them up? Rebuild exisiting, buy new replacement. I see flaming river in Summitt. Final question, am I going to be able to change it with the motor in it with the TTI headers on? It's always something.