To this day Canada has a significant aviation industry, Bombardier group claims to being the third largest aircraft manufacturer in the world, but with the notable exception of a military aircraft industry. Which as some of our Canadian members are likely to point can be blamed, to the CF-105 cancellation back in 1959.
Arguably the claim holds a degree of truth hence the obvious question is how much. So lets posit, George Drew doesn't catch meningitis, he remains at the head of Progressive Conservative's and leads them to one more electoral defeat at the hands of the Liberals in 1957. CF-105 goes into production for the RCAF by the early 1960s as originally expected.
So how does the Canadian aviation industry evolve from there? The Arrow likely gets some export orders but being a dedicated interceptor, at least at this stage and big and relatively complex I wouldn't expect that many of them. Nevertheless a domestic Canadian aircraft industry not just making but also designing fighter aircraft is still there. Do we see Canada remaining in the fighter design business either on its own with the NFA in the 1970s becoming a domestic design, or in partnership with Britain and Europe? Or is CF-105 even in success the last of it?