I have found that alcohol engines do not require alot of timing.
we run 32-34 degrees.
As for tunign on alcohol, plug color is not going to work. You need to run a plug with the gold color cad plating to see what temp your engine is at, look at the ring that supports the outer electrode. It should be discolored about 75% of the way around for best mixture.
Other than that use a EGT and at wot you should see 1100-1200 degree's