Why such a small gap? Are you running Alky?
The smaller the gap, it reduces potential for igniting the fuel mixture (less hp). Stock spec is 0.035. Some use to recommend 0.032 when pushing higher boost. When Alky became popular, owners tuning found they were getting spark blow out and need to reduce the gaps to 0.030, 0.028 or 0.026. Lately I have been seeing owner using using the Alky spark plug gap recommendation for non Alky SyTy. It's just not needed, in theory it lowers the performance.