5.9 Magnum Question

Did about the same as Abodybomber.
Mine had about 90k on it and cylinders and bearings, looked near new but the heads were cracked on all four corner cylinders right between the valves.
EQ heads, Hughes springs and retainers, stock magnum rocker gear on mine, custom regrind LA style roller cam with a Carter rotary vane pump and full circulating fuel system.
The Magnum has a great bottom end that lasts a long time, but the heads are the weak point in them.
The relatively inexpensive EQ Magnum heads solve that problem and flow well right out of the box. (about 230cfm)