I think that all of Al's 48 and 72 hour performance were splits. In the 90ies there was only one 48 hour race in France and 72 hours was non existing. 6 day performances you have to measure against and that is won by Al easily with 226 km more than Dave's performance.
not really as Dave's 6 day total was done in 4 days....he dropped out due to an infected blister, and since it was only 6 months before this attempt he didn't want to risk further injury that would harm his prep for crossing Canada. Yes you can say this is his inexperience, etc ....but still can't compare Al and Dave's 6 day ability from that