:From what I remember to install two OEM pumps one needs to be taken off to drop in the unit and then reinstalled while it is part way into the tank. :And yes 700 rwhp can be supported with one OEM pump ;)
I'm currently running 2 of these pumps right now. Haven't really been able to do any tests with them but i know they will flow alot better than anything on the market right now unless you go with a bugatti fuel pump. They are really small as well. I'm currently going to be using them for 700rwhp on e85.