Bolt pattern for wheels

[novanutcase]

I'm thinking of swapping out the drum brakes in front on my '61 to '65 disc brakes. Can anyone tell me if the bolt patterns are different? Also, if I replace the '61 drums with the '65 spindle, rotor and caliper will the track width be different and if so by how much? I already know that I won't be able to use the '61 wheels with the new disc brakes as the caliper sticks out too far and will hit the wheel but I plan on using different wheels.

Thanks!

John