Hi, Ryan. My friend who ported the 915s on my 340 also has done a set of those iron R/Ts for his Dakota. I'll have to check his numbers now, but his truck screams! He also was impressed. His biggest problem (he runs a Magnum hydraulic roller motor) has been getting RPMs out of the lifters. I think I have him talked into trying the Crowers, as they claim to have the high RPM problems resolved. We'll see. Good job!
