I have always had good-luck with keeping the gap on my Autolites around .028-.030 and in all my years of racing have never gone over .035 but I run the MSD 7AL3 box. Never really saw a reason to open them up more.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time