Hello All: I am having a problem and could use your help. My '66 Riv GS has a column shifter. Recently I had headers installed to a mostly factory dual exhaust (except at the collector). Since then I have noticed that it becomes physically difficult to shift when the car has been run for ten or fifteen minutes. I generally have to shut the engine in drive, let the car sit another 10 minutes or so before I can put it in PARK or if restarting , back in DRIVE. Under the hood, I disconnected the cotter pin to the trans linkage, nothing seems out of place. There doesn't appear to be anything impeding linkage travel. I cannot imagine heat is expanding the metal so significantly as to have the linkage rod hit the firewall, a good 1/2" or more. Hopefully I have overlooked something little, or better still someone else has had the same problem and overcame it. Thanks for your help. Paul
Since you have ruled out any possible fault it then has to be the impossible. Try to insulate the headers were it is adjacent to the linkage.
