It doesn't do it very often and it only does when the car has been sitting for about 24hrs
or so. When the car is up to temp. It sounds like the rpm moving around but rpm gauge is stable. once you get the car above 1500 rpm it fine about 30-60ish range. Denengage overdrive doesn't seem to matter. I am thinking maybe it misfiring. The wires are rather old. It is not though any codes.

Most likely it is wires/plugs as you believe. I'd start off there.

Typical misfire symptoms.

The plugs are about 1 year old. The wiring well is original. What kind wires do you recomennd. and should on change spark plugs again. Right now she regular ac-delco in though. should i get better ones

I would say get a good set of Beldin'* of the ACdelco'* both are trusted around here

sounds like a plan

just to let ever one know I put new beldin wires on for $32. Fixed the problem right up. Take if for field trip opps that machine 100 no problem and no vibration now,minmal sound. I need to readjust the rear passenger door seal

Glad we could help.