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 exhaust manifold with wideband AFR meetering about 40" from the closest exhaust valve.
All recommendations where the Edelbrock RPM intake manifold.
So far so good.
With the M1 IM it ran pretty good and AFR...
383 intake manifold change AFR big time
