I'm thinking about something like CSRL from B-52/B-2/B-1 but I don't know if it'll fit into this strange shaped missile bay.
I removed the interior walls and bulkheads that are molded to the bottom half of the fuselage. This provides a couple more millimeters of internal volume but still not much towards achieving enough space to mount a number of individual weapons. I was hoping to create some features on the inside of the fuselage to suggest stringers and ribbing with a new bulkhead fore and aft with a left and right weapons bay door.
If you were to change the scale to 1:144th or 1:72nd scale you would certainly have a lot more room inside for weapons in these two scales. Of course that also requires a modification to the cockpit and the landing gear to put things into proportion as the smaller scale would then represent a much larger and heavier aircraft which would be hard pressed to use the landing gear parts included in the kit. One solution to the landing gear would be to just close it up and have the model posed in flight. The other choice is to find suitable landing gear parts from an airliner model. Switching the cockpit to a smaller scale gives you a chance to look at a two-seater arrangement like the F-15B/D/E, F-16B/D, or the F-14 with a tandem cockpit arrangement or maybe something side by side like the F-111, Su-24, and Su-34. The tandem seating arrangement would be the easier of the options to take as anything done in a side by side arrangement is going to require some serious body and fender work.