Yeah I did the balancer a few years ago when it had the crazy wobble going on. I mean it's probably a good idea to just do the DOD delete at the same time. Yay working on cars. Always super fun.No surprise. L76 tensioners virtually never come out in one piece. It's somewhat rare for it to cause issues but you absolutely should still get a tensioner in it and I'd probably avoid spinning it too high until you do. While you've got the timing cover off, replace the junk harmonic balancer too before that comes off on its own.
That is, unless you want to use this as an excuse to do a proper AFM delete.