Time for a Long block?

^^^
This!
But, if it does come to needing major work, fear not.
I've found that the /6 pretty much "falls apart" and "falls together". I recently rebuilt mine and I gotta tell ya, that was the simplest rebuild I've ever done in my life.
I got a "running" slant from a guy, I decided I was going to reseal it, and the next thing I know I'm down to a bare block. Glad I did too! My rings were super brittle, this thing would have been a smoker for sure if I hadn't done the rebuild.
I replaced everything, and sent the head to a machine shop I trust.
In the end, I have about $500 in the build. keep in mind, I did put it back stock, and my wife works at O'Reilly's so parts were cheap!