Is it ok if the spark plug gap is 0.38 for small block 350?

The recommended spark plug gap for a small block 350 is typically between 0.045 and 0.065 inches (1.14 to 1.65 mm). A gap of 0.38 inches (9.65 mm) is significantly too large and could cause problems with engine performance and ignition. It is important to use the spark plug gap specified by the engine manufacturer or as recommended by the spark plug manufacturer. Using an excessively large gap can lead to weak or misfiring spark, resulting in reduced performance, rough idle, or engine misfires.