[84LX89GT]

I put in a BBK 255 LPH pump and what they don't mention is that the pump flows SOOOO much that you have to upgrade your fuel lines.
Before install, fuel pressure set at 35 psi with my adjustable fuel pressure regulator at idle.
After install fuel pressure was at 85 psi. i removed the return line and ran a line to a bucket and pressure dropped to 35 psi. I reconnected the return line at the fuel rail and disconnected at the pickup and ran it into a bucket.....still 85 psi. No kinks in the lines and nothing restricting except for the diameter of the line.

So my next mod will be bigger fuel rail, AN steel braided fuel lines and a new fuel tank pickup (somewhere in the $400+ dollar range )
I would probably go no bigger than 190 lph unless you really need it.