A great choice for a project!
Not to make your life difficult, though, but the F4F-3 did not have shoulder belts, just a lap belt. Factory installed shoulder belts did not appear in F4Fs until after Midway. The -4's flown there by VF-3 and VF-6 had only lap belts, those flown by VF-8 has ship designed and installed shoulder belts. But -3's . . . not at all.
Regards,
Rich