Originally Posted by Chris98Gt

I'm pretty sure the 98's are still a return style fuel system with a 99+ style tank and hat setup. My 98 was like this. So before you put a returnless pump in and burn it up check your fuel rails to see if there is a return line coming off of them. I "think" what makes it difficult for the 98 setup is that the pump diameter is different, like the returnless pumps, so even though the 86-97 255walbro pumps will work they don't fit the 98 hat. When I ordered my fore dual pump hat I'm pretty sure they had two options. One for the walbro style return pumps and one for the returnless pumps.
I also ran a 90mm Lmaf in a blow through setup with 42lb injectors with no issues at around 400hp with the procharged setup. Although if you plan on upping it in the future might as well buy an 05 style slot maf and 60's from the get go.

Originally Posted by Moonshine

Thanks for that Fred. Good info to have! Still not sure if I'll be swapping the tank or adding a pump.

How efficient is adding an in line pump? Will it be adequate?

Originally Posted by amoosenamedhank

Why don't you just do a COP swap.... much cooler than a coil pack relocating bracket.

Originally Posted by uberstang1

Ehh, Coilpacks in the long run are less headache than COPS, and also give out some more consistent reliability.