Well, to make a long story short...
This winter I change from Mopar M1 dual plane intake mainifold to the manifold that all recommended for my mild 383 .030 over, decked block, Lunati 256/262 @050 213/220, Speed Pro flat top pistons @about 0.0 in the hole, 915 heads, 650 AVS2 and Mopar HP...