Gasser in tank pumps...

[flareside_thun]

Is there some reason you can't retain the high pressure rail pump and just run an adjustable FPR?

 

[Agnem]

...
F-it, im just gonna leave the pumps in the tanks, run another pump in place of the high pressure pump, and call it a day. I dont see any reason why that setup shouldnt work. I just dont see the point of pulling the in tank pumps if they are low pressure pumps anyway, Ill just run them til they die and then pull them.

That's the way I did it in the Moosestang. No issues, works fine. Lasts a long time.