Anyone using the procomp 6.70 or any of their h-beam rods ? I bought a molnar 3.915 crank. Srp 1.320 ch pistons & the procomp rods, they say they're rated for 800 hp & are a decent looking rod, the yield is 200,000 on the fasteners, they're not arp but are said to be 8743 ? chromoly. Anyways just looking to see if anyone has real world experience with them. My 471 stroker should make close to 600 hp .