Those pictures make me want to build a Draken with all those modifications - larger wings, rudder, RBS-15 and ECM and those delicious delicious retractable canards from Mod 4, J79, and larger radar and IRST. Alas, I only have one 1/72 Draken in the stash - the old Airfix destined to become a non-whiffed Finnish Draken - so I would need to source another Draken, perhaps a Gripen (that would surely find some other use) for those RBS's and ECM pods; J79 can, IRST and why not the bigger radome could come from the abundance of Airfix Phantoms in the stash (since it does not build into anything but B anyway without modifications more trouble than they're worth, those longer burner cans and E-type radomes are just waiting to be put on something else).
Speaking of the canards, what would have been their purpose? "Whiskers" to stabilize high-speed low-level flight? (Would go well together with that strike-oriented "fit".) They do seem to be a bit on the small side to be vortex generators/high-lift devices Viggen style. Then again, since the drawing and Googleing indicates they intended to keep the one cannon and the whiskers would block the firing line when extended, that would hint at a landing/take-off aid?