Welcome to the Club! Bogs, but recovers. I will givew three suggestions:
1. More initial/total timing
2. If bogs right after WOT, then squirter size too small. Work up in .003" sizes until bog/stumble disappears.
3. Engine runs good from WOT, but, falls, lasts for about a half second, then dies. Could be running out of fuel volume from accelerator pump. Either move pump cam to another position or install cam increasing amount of volume.
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