Topped out @6100rpm on a 318 w/340 cam+4* w/140psi cyl pressure and stock 67 closed chamber 318 truck heads and headers in 4 spd 3.73 geared valiant.
It would just shut off @6100, plenty or rpm really, and what the cam was good for.
If you have an automatic, I would consider the performer over the holley, but thats just me.