How to change timing chain on a 3800 v6 on a 1988 nightyeight?

not getting any power , car is back firing used harmonic balance placed on car recent|||get yourself a car repair manual at any car parts store. Haynes or Chilton etc They are inexpensive and tell you everything you need to know to work on your car.|||Remove everything, replace chain while lining up the marks on the gears, make sure it starts before you reassemble and put it all back together.