[grimesjm1]

i'm not saure on the timing specs for the 5.0, i have a 5.7, but you need to unplug the electric spark timing advance wire to get an accurate timing reading. on my 94 z-71, it's a tan wire black tracer under the dash on the passenger side. that is why you may have been getting a reading of 25 degrees. if the 5.0 is the same as the 5.7, correct timing with the est wire pulled should be 0.