What are the details of your build? and are you dynoing or just going to run it?
Timing on the handheld is pretty basic but works, you can get more precise using a laptop.
However, there are a couple of things you need to do
1 - Make sure you are precise in distributor setup
2 - Set the cam choice based on expected vacuum, (stock >14, street/strip about 7-14, race under 7 inches)
3 - I have had some versions that allow both idle timing and WOT, but not all have the choice. If you have it, put idle at 16, if you don't and only have WOT, I'd start at 34
4 - Do a static timing check, (Tune>sys>static timing, set 30) Fire it up and read timing. If the light matches the 30, good, if not, turn the distributor to make it match)
With cam specs, compression, heads, cid, etc i can get closer on timing numbers, but in the end, the handheld will only give a basic curve, you'd need a laptop to change things along the curve
Last thing, handheld, ECM and laptop all have to be on the same version, and the latest versions generally fix a lot of odd things. So once you get it running, recommend some time learning update procedures. Remember, each component, laptop, ECM, and handheld , all have operating systems...that is what you update. The GCF is the file that contains the details, but those parent files change as Holley does improvements
