440RB INDY DUEL PLANE OR RPM INTAKE HELP

Also i have been reccomended to use the holley stealth system.
Im sure the engine im going to use it on will go tad over 600hp but a holley dealer tells me it will work just fine. he tells me you can turn up the fuel pressure and it will compensate. But its limits are 650hp. What have you played with and have you got any comments on this

It looks like you are on the right track for 700hp with the 493 then.

We used the 550-406 Terminator system on a pump gas 383 Chevy. The 550-440 Stealth just looks more like a carburetor, hence "Stealth". Easy to use. The engine made 531hp with an 850cfm carburetor and 518hp @ 43 psi fuel pressure with the fuel injection. I believe with more time for the system to learn the engine it would make more power. The owner only wanted 450hp so we didn't use up any more dyno time fiddling with it.