Power brakes to manual

[CARR33]

I have a 67 with four wheel power disc. I dont think the motor i want to install makes enough vacuum. Its a 350 with 10.25 compression, performer rpm heads, and a comp cams extreme energy cam-xe284h-10, 284/296duration with 240/246 at .050 . The motor in it now is identical but has a 280 magnum cam with 230/230 at .050 and it works fine but its worn out.what do i need to convert to manual disc brakes. I have an electric vacuum pump but i dont want to rely on it for brakes on my dd.