Thanks. Looks like 35* is the magic number. Being that mine loses 3 or maybe 4* with rpm, set at 34* would be 30 or 31* down track. Being locked helps with the large cam as well, but i would like to see the required timing mapped some how on a big block and mapped every 500rpm. curious how much power loss there would be with timing locked at say 35* instead of giving it what it wants at every rpm increase.