there's a service connector underneath the same panel your ECU is. Jumper it with a paperclip (Or make a connector out of the female connector that the speakers use). That'll "Lock the CEL". Normally it's called "Service mode," but to each his own.
After you jumper the SCS, you'll then use a timing light to set the timing. I can't remember what it should be set to, but 16 deg BTDC sounds about right.