The 324rwhp run was w/ the timing set to 17 degrees. The latter ~340rwhp runs were w/ the timing set to 19 degrees. And they were done in May 2001 in ~80 degree weather w/ mild humidity. I'm thinking about dynoing again in TX Summer heat w/ the timing at 21 degrees to see if it can handle it ok.
BTW, I always thought that flat tq curves were better than flat hp curves...? Consider that after hp peaks (and flattens out), your *probably* isn't going to accelerate anymore...?