Reverse Split Pattern Cam - 318 Magnum Head swap

when the exhaust port flows too good, it sucks intake charge out, and burns in header, on the overlap stroke. been down this road before, the 576 head mopar sold did that. I tested in on flow bench, up to .250 the exhaust out flowed the intake. this is the overlap area. there is a loss of a lot of power. headers will glow red.