Real data. EQ standard replacement Magnum head and comparisons with oem and NZ versions.
He really needs to cut the diameter down to fit the small 1.970 inch seat.
The overhang will kill flow.
Not worth a race build, just good enough for a snappy street 5.9L
If I wanted stock iron look, I'd grind the edges and rough shot pein the outsides of an alumimn head and paint it engine color. 15 feet away look.