360 or 440 for my 1970 dart daily driver

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This is the car the engine would be going into an ive had about 10 years of driving experience, the car already has the slant in it and ive been driving it that way for about 2 years
Very nice I see why you want to up the power of course I'm on the grumpy old man side of the life cycle but for me a well built 360 magnum that can handle some sort of power adder and high RPM's for those times you feel the need would be the way to go upgrade the suspension as much as possible for handling stop light to stop light gets old