Yup. And for a "street only" car you can probably push that horsepower number up a bit.
If I have to buy new lines I usually buy 3/8", they don't cost much more and if I ever decide I need big horsepower I have one less thing to change and it doesn't really hurt anything in the meantime. But if the lines don't need to be replaced because of their condition I don't worry about it.
As far as fuel pumps go, I personally prefer mechanical. Again, this is for street cars. I just like the simplicity, and not having to wire in a rollover cut off switch. I use a Carter M6270 "strip super" mechanical pump with a fuel pressure regulator on my Duster, that pump was cranking out about 8 psi on my car with a 3/8" line so I needed to dial it back a little with the regulator for my 750 double pumper. On my Challenger I ran the same stock replacement mechanical fuel pump for like 7 years and probably 50k miles, and it was on the car when I got it so who knows how old it was.
The only way I'd go electric would be to go to EFI, and if I did that I'd get a new fuel tank with an in-tank pump. Might as well do it right.
