The canards and double delta wing look good. :)
A further tweek might be to have fixed F-18 style strakes above each intake, which would improve their high AOA performance, and mount the canards to those, which would have the advantage of putting them on a longer moment arm relative to the C of G.
As a Western 1960s interceptor (i.e. the Canadian Arrow-competitor idea) you could give it a two-seat cockpit, with a RIO in the rear seat. Looks like there's plenty of room, and a Tornado canopy should be about right. Alternatively, a 2-seat Su-15 one would also be about right, and you could always plunder the cheap PM kit for one of those.
How about fitting it with a big, tailless delta or double-delta wing, possibly a second seat, and British missiles, and passing it off as a Fairey-designed interceptor that evolved from the FD.2?