Stock Magnum rods/pistons durability ?

Does anyone have any more facts concerning the EQ heads from Imm versus PIE's heads. Level 1 port job with pretty impressive flow #'s at PIE for $1500.

As I recall, the flow numbers were very similar, but keep in mind they are using different flow benches.

As this has been brought back to the top though, I might as well update it. I went ahead and built a 408 stroker out of my Magnum. After talking to the machine shop, it might of not needed a bore, but since I was going replace the pistons anyway, it made sense to do so. If nothing else, I know everything is in good shape now. The other development is since Trick Flow has started making their heads, I will most likely be using those. With the shipping cost that both PIE, or IMM thrown in, the TF head are not much more when you catch one of the $100 off promotions at Summit Racing. I have heard of members ordering one head at time to get the best deal, but is not too hard to do.