Adding timing chain tensioner

Has anyone added a timing chain tensioner when rebuilding a small block (273)? If so, I'm looking for information on what tensioner you used.

My chain has a horrible amount of slack, so will likely need replaced. I've heard the tensioner is a great little upgrade to the timing chain and is easy to do.

Thanks!
I did but wouldn't again. If you have a quality double roller timing set it is really unnecessary. I was thinking, where does the plastic go that wears off the tensioner block as it wears?