I'd be surprised if you needed to turn it 7500 rpm. Peak power with -1 heads on a 540 with a 400-3 intake is probably in the 7000 range. Get the engine on the dyno and you'll know where the peak is. Knowing where the peak is will help you when it comes time for gears and converter.
What other intake can I use Andy? I have the Indy 400 intake for 4150 with a spacer for 4500. Is there another choice?
That’s what I have been using in my 499 and I shift at 6600 and go through the traps at 7350 in excellent weather. The 499 made max hp at 6400 but with a small roller cam 269 273. 696 lift. Headers were also small on the dyno.
