So you're unable to get the 10 degrees you're after?
I actually had this problem on a stocker. With the dizzy installed properly it was physically impossible to get base 10 degrees with the diagnostics port jumpered (or not for that matter).
I found that somehow the triggering teeth had rotated on the shaft. The teeth are just press fit on the shaft for big port AE82 dizzy's at least. I was able to get a shifter onto the flat of the shaft after taking the rotor off and could turn it enough to get it where I wanted it.
Fixed the problem!
I'd set it all to TDC 1, make sure the cams are lined up and then turn that sucker until the teeth and rotor line up properly to get sparking for cylinder 1.