Poly 318. I know nearly nothing about the poly 318, but I thought all of them in those years were adjustable.
Hopefully this is the problem and nothing else was disturbed while diagnosing it.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.