When you spend MILLIONS on development you have to push/keep what you've built. You can just throw it away because of a mistake or wrong choice. Many car Manuf. have had mistakes and kept move'n it. Ex.. FORD Diesel 6.0L complete junk but it stayed in the trucks for years.

Your E.T. and MPH are fine but REMEMBER a 302 with that head flow and intake and cam size would do the same or BETTER even at that weight.

Please don't estimate E.Ts from MPH you're MPH will drop once you hook that car better and it'll run 12.7 to 12.9@104.5-105 at best.
Don't get me wrong its not bad but again a 302 with out do it every time.

Lets not bring up how much more advanced the computer in your car is to the old EEC-IV there's probably 15-20hp it that alone. what about better trans gear ratio's and the 4.10-4.30 gears you run.

Until a mod rev's over 8000rpm it will have NO advantage over a pushrod mod.

Ford and MOD motors=Suicide:

You're a funny guy. $2000 into my mod motor and I made 419rwhp on a safe tune. Best part is, I don't need to worry about my block splitting in half, ever. The 4.6 is a great motor. I take it you've never owned a car with one because if you had you wouldn't be firing off at the mouth like that.

I've had both, I'll take the 4.6 over the 5.0 any day.