Trick Flow small block heads

Pretty much any head from a trick flow on down isnt gonna make peak power at much over 6500-6700 with a 4 inch arm
Even my W5 heads i shifted at 7k(422 cubes)
Just not enough head for that much stroke(4 inch)
Like Pittsburgh racer, i have been down the track a bunch, tried all kinds of different rpm’s to shift at
If it dont go faster, why wring it out unless you have an unlimited wallet and time to thrash under the hood all the time
No thanks