This Navy photo shows an Enterprise Wildcat taking off on 24 February 1942, the day of the Wake Island raid. According to Lundstrom, McClusky was flying F-1 that day, and this photo shows an F4F-3 with a black 1 on the starboard side of its cowling. It also does not have the larger national insignia on the fuselage, but clearly has the wing insignias on the undersides of both wings. I would guess this aircraft was recently received since it's being brought up to VF-6's paint scheme standards. So, F-1 was an F4F-3 for sure, but it looks much more recently recieved than my prior guess, 3973 probably looked, since 3973 had been with VF-6 since December 1941 and there would have been plenty of time to bring it up to paint scheme regulations. Again referencing Lundstrom's excellent BuNos list per cruise in "The First Team", VF-6 received three new F4F-3s for the 14 Feb-10 March cruise comprising BuNos 4000, 4002, and 4017. 4017 is off the table because it was lost on 24 February and Lundstrom states that aircraft was F-2. So, if my hypothesis is correct and the photo date, then the evidence points to 4000 or 4002 being F-1, the aircraft McClusky scored a kill in near Wake.
Oddly though, the aircraft is carrying a bomb (as is the one behind it), which VF-6 did not carry for the Wake Island raid. Could this possibly be a photo from the Marshall Islands raid on 1 February? If so, then I guess 3973 is still on the table as a possibility.