If you want more advance, fuel pressure- makes a huge difference
You gotta make a gauge that taps into the internal pressure of the pump,
something like-
43.5 Psi at 1000 RPM
2000 Rpm -about 75.4 Psi
I read in a post somewhere that these old pumps may have softened springs already from use;
I had to put several of the spring shims back in after adjusting my 1.6na fuel pressure. Static timing was good for starting, but when I revved it would rattle from too much advance.