As far as I know the 38 never carried a torpedo into combat. They tried modifying it for that purpose, but it was never finished. That's what you have TBM's for dangit.
OTH, I would love to see the ground strafing version of the P-38. They added 8 more .50 cals in the wing for a total of 12 .50's and a 20mm cannon. *yummy*