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1986 chevy: thinking the timing chain has been put..without taking

Customer Question

1986 chevy 305 motor timing off the light says it is at 16degrees I am thinking the timing chain has been put on wrong. How should I check to make sure without taking motor apart?
Submitted: 12 years ago.
Category: Chevy
Expert:  Tech501 replied 12 years ago.

 With only 16 deg BTDC, your timing chain is not wrong. It would be miles off. Are you sure you understand the different between ignition timing and valve timing? Your checking the ignition timing and that is adjustable. First jump the A B terminals of the ALDL connecter under the dash (see pic of connecter below) and then turn the distributor to set the timing to the spec on the label under the hood. I tried to look up a spec and the book referred me to the label.