I have no dog in this fight but here is some info from the old IHBA site in 2009. These are 1/4 mile speeds, before they went to 1000ft.

TOP ALCOHOL FLAT
179.72 Johnny Heidemann Super Nationals Chowchilla CA 2008
174.66 Johnny HeidemannNitro Nationals Red Bluff CA 2007
173.62Johnny HeidemannNitro Nationals Red Bluff CA 2007
176.04Johnny HeidemannNitro Nationals Red Bluff CA 2002
171.70 Don BausherWorld Finals Chandler AZ 2004