OK i have read all the comments here and i just come to a conclusion,
Lets be real here,
If he build the 440 it will last for ever no mater what he trow at it remember guys this is no race car here and he don't need 900 HP.
All in all a well built & tuned 440 will give him 450+ HP in a budget with more torque to spare than a 451,
Size is not to significant to take it in consideration,
Weight, neither,
So why take the inconvenience on doing such an engine when you can have what you need in the 440?
Buddy if you are not building a serious race only machine, save the head etches and build your 440 you will be more than happy with your end results and even in the 650 hp range it will last for years to come, if done properly.
