Mike I would not hesitate to use a stock crank and rods shifting at that rpm. I am running 10.68 in the 1/4 at 125 mph with the engine I got from BJR. 0.30 over 360. Stock rods and cast crank. With the 28" tires, 4.56 gears I was shifting at 6500 rpm and crossing the line at 7000. With the 31" tires I am shifting at 6300rpm and crossing the line at 6600rpm. 50-60 passes now. Once I solve my traction problem I expect to get in the mid 10's or better with this engine.
I have turned my 340 up over 8000 rpm several times by accident (missing gears) and have never had a rod fail. Did bend a few valves though. I have been around small block mopars most of my life and dont ever recall seeing a stock rod failure but I am sure there are many. Maybe I have just been lucky. Saw a lot of big blocks come a part though. My new 416 stroker short block does have H beam rods but only because everyone told me I should use them and I am hoping to see 600hp. If I had been on a tight budget I would not have hesitated using stock rods.
