Ignition Timing adjstemnt For H-iCompression

[Bob Bidonde]

I have a 6:1 cylinder head on my engine, so I can only use the first 3 notches on the spark lever. The 3rd notch is for 30+ MPH speeds to avoid spark knock. I need to be able to retard the spark somewhat to fully appreciate the hi-compression head. My thought is to time the ignition at TDC of compression of Cylinder 1 with spark lever down 4 notches. This should give me 4 notches of lever travel up to retard the spark to occur at about 13 crankshaft degrees max.
What are your thoughts about my plan?