Re: Firebird pups
There is no 'should', with respect to position. Neither historical Gibson practice nor tonal/output considerations are set in stone.
There was 1 pickup wound back in the day, put in the 1,2 or 3 positions the guitar was routed for. Approx 6.5K +/-, with the earlier ones more inconsistent based on specs back in the day. By 1965 the wind was done in a pretty consistent way.