383 or 400 ?

I am seriously considering putting a big block in my dart, I know people will say don't do it, and it's not worth the work etc, but I had a 383 car a long time ago, and just want opinions on if I should go 383 or 400 if I do it . This will be a street car no drag racing, I am kind of leaning towards a 383 since I just picked one up on the cheap, but I also have a 400 available what do you guy's think would be the better option? If I go 383 it will not be stroked, 400 would prolly have to be to get any power out of it. Again, just looking for opinions on which is the better option .