[quote=Sniper]Are you planning to spin it up to 6200 rpm or more?

Doesn't seem so with an OD trans.[
/quote]This motor is a little better than stock 3.91 stroke, bigger than stock factory cam, a set of Herb Mc Candless 452 ported big valve heads, RAS 1.6 rocker arms,, Eddy Performer RPM with a later model (List 4781-7) Holley 850 DP , 2.0 headers with a full 3.0 exhaust system to the rear bumper. typical fun street and cruise build, I hope
I'm expecting a little bit above 520HP at or above 5900 RPM hence I don't want he ECU to limit the upper RPM below 7000 RPM
I'm thinking it will stop pulling hard around 5800 to 6400 RPM so when it tongue comes out it is time for me to shift it
Thanks to all of you for the help