Most of the LEND LEASE B-24J to Britian came from CONVAIR Fort Worth (J-CF). Some were J-15- 35 similar to your old Airfix kit. The vast majority were J-40/-105 Emerson nose and the Hasegawa fit has the FORT WORTH style nose. (nose gear doors come down at block-70-CF) . Thus you will find most RAF J series equvalents do not have the familar, high mounted pitot horns, only one low on the port side by the nose wheel. I m not familiar with FAA, however some of the CC have British turrets in the nose of the earlier J . You could fash one of those from a D kit if you have the right RAF turret and even add RAF rocket stubs.