Generally, you should not need to reduce your spark plug gap to .030 w/only running 12 lbs of boost w/an HEI.
The only times guys reduce there gap down to say about .026 -.028 on there Syclones & Typhoons is when they are dumping in a lot of methanol. I run a .040 gap on my Syclone w/an HEI ,I also run a MSD 6A box & normally run 17-22 psi range, I have not snuffed out my spark.
Max RPM on stock Syclones is about 4800. Stock boost pressure on the Syclones & Typhoons is 14 psi,no reason to run a small gap from the factory.
