electric vs mechanical fuel pump

I am attempting to make my Dart run again asap. Its a 273 auto. I am sure they work great but right now im just looking for what works now.

I am looking for the easy route to getting it running. I am considering using a mechanical for now. My friends are saying electric but it didn't come with one so why spend that money for something I don't need yet.


Does anyone know the horsepower loss/gain by using a mechanical instead of an electric pump??

Any info is appreciated, thanks.