bad fishy,those marsh heads looks like mopar performance p5153524,on another note has anyone used these mp heads before
They’re not MP - no MP casting number. Pretty sure they are the same castings as ProMaxx, but not stamped as ProMaxx on the ends.
ProMax buys their heads as raw as possible and they do their own seat, valve guides, and valve job work. I had a set of small block heads on my flowbench that a friend bought and they are very nice.
