My 318 is 30 over. Has the 340 adjustable rockers and 340 cam. 051 heads 1.88/1.60 valves. The valiant it was in had 3.31 gears. Edelbrock 600 on streemaster 318 0-5000rpm single plane. If your setup is like this the melling standard output is fine.
Make sure the pickup is clearanced to the pan floor.