Dual Tanks, Anyone Using TBI Pumps to Feed Single Walbro In-Line Pump for LS Swap?

[Ford Assassin]

Any reason this wouldn't work on my TBI/454 1988 R30 for my 5.3 swap? I have done well over 25+ LS swaps, but never had to deal with two tanks,

Here's the paper napkin plan:

Each in-tank TBI pump (both new Delco pumps 7 months ago), through the factory fuel lines to the stock tank switch valve, then valve would feed into the high pressure pump (Walbro 255 in-line that I already own, just need to splice in), then into a
Wix 33737 Corvette style filter/regulator (and fuel return plumbed back into the factory/stock fuel lines, through the switch valve), lastly to the 2005 returnless the fuel rail inlet.

This would be the least expensive route for me since I already own everything from a previous project combined with the factory TBI fuel system. Easiest too from a labor stand point.


Thanks.