Looks like EL by length & engine. (1947-50 by tank badge)
No doubt the bikes are "big-twins", and the "springer" type of forks narrows it down to pre-1949. (1949 and up big twins has hydraulic forks). I cannot see the engine very well, but it looks tall and the shape of the tanks agree with that it is an OHV engine. (The sidevalve engine has a perfect symmetrical teardrop shaped thank whilst the OHV model tank is slightly flatter on the bottom side to give room for the taller OHV engine). So depending of the year it would be a "Knucklehead" engine (last year 1947) or a "Panhead engine" (first year 1948). But the nodel designation would be the same, model EL for the 1000cc OHV and FL for the 1200cc OHV versions. Since it was made much more FL's than EL's at the time my guess is that the bikes are 1947 or 1948 Harley-Davidson model FL's (1200cc OHV).
