Check the front tires off the ground for run out, out of round, to see if that is hurting you scope
I like to see less than 1/4 inch (.250) run out, no more than that twocents
I had some high speed shake issues on my old pump gas Duster, I had replace all the front end wear parts when putting it together, the "new" idler arm wore out in less 1000 miles puke I could move it up and down by over 1.0 inch on the drag link end rant, I replaced it again and fix it, no more issues after that shruggy

Last edited by Cab_Burge; 03/01/21 11:31 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)