340 528. Purple cam question

In my mates 12.7:1 440 1050Dom, Victor int., 5000stall, 4.56's the DC.590 sft went down at the top end at around 6800 and had to be shifted at 6300ish otherwise it would slow, so yes the .528 would be dead before that I would think with less duration. The same .590 sft in my stock 340 would still pull well at 6400 through the lights, I would imagine that would go to 7000 but I never went there, doubt if the .528 would run hard to 7k?