i picked up a 68 440 dual point at spring fling, and want to do a restoration as a project, probably long term!

where do i find parts and such for these? like the screws that hold the vacuum advance on are pretty beat up.

and can anyone give basic info on what needs to be done? like the vacuum advance, (which does work), has a lot of surface crap on it, and so needs to be cleaned up, but i don't know the best way to do this.

any thoughts or pointers appreciated!