Convince was the wrong word. I guess it was more "I'm told it won't work with a ton of custom fab, is this true?" Regardless, I'm pretty sold on it, so hopefully this winter I'll stuff one in!
I agree with abodyjoe, I was told the same thing, you'll also hear crap about weight. a 440 is only 120 lbs heavier, stock for stock than an LA small block. you can lighten it pretty easy and depending on budget, can get it under the weight of a stock small block with much more power. Aluminum intake, headers, alum. water pump and there's 40-50 lbs, go aluminum heads and theres another 70-80 off.