That longer arm is everything!
Those few years that the 360/5.9 blocks oiled to the top end, are the ones to find. after you have gone thru a couple pair of cracked magnum heads, you will know why.
Magnum Blocks (roller cam) that don’t oil to the top, won’t take LA heads. And those years
at least you can have a choice.
Roller cams are expensive. 1.6 rockers aren’t everything, when you consider machining for valve
lift and spring seat clearance.
