I bought this 1986 420 with 129K on the odo. The maintenance records were not well kept. I am basically fixing one thing at a time and have been happy so far. I put my timing light on the car and it reads perfect, is there any value to changing the timing chain just in case? What's the approx cost?
ps.I put the +4 Platnum plugs in yesterday and noticed a boost right away.
|