Factory LOW HP is a high altitude engine, less O2 at high elevation and same amount of fuel means black smoke and ...and HIGH EGT's
In all likely hood you've got a worn pump and injectors as well.
If you dig around my threads, you may find a tip or two on timing, go to advanced type TECH 101 choose thread titles and my username, there are about 3 or 4 threads, showing marks and all kinds of info for you.
Time at 2000 RPM use timing tape if you have a non adjustable timing light and yer golden!
Hope that helps
In all likely hood you've got a worn pump and injectors as well.
If you dig around my threads, you may find a tip or two on timing, go to advanced type TECH 101 choose thread titles and my username, there are about 3 or 4 threads, showing marks and all kinds of info for you.
Time at 2000 RPM use timing tape if you have a non adjustable timing light and yer golden!
Hope that helps