Bikeman, you do this when the cam needs lots of base or idle timing. The cam I used is 235/249 @50 and I'm still on 8.75:1 compression. This cam wants to run on 10.5 cr. Here is a link to a great page for more info. Locking out a dizzy is near the bottom.
http://www.crankshaftcoalition.com/w...EI_distributor
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