First I wanna make sure I have the parts going in the right order.
Rear diesel tank, vegmax filter,polluck valve,fuel pump, billet delete slug
Front filtered wvo tank,hot fox in tank,vegmax filter,polluck valve, fphe, vegtherm mega, fuel pump,billet delete.
You may want to put your FPHE before the Pollack valve. Depending on what you're desired effect is, but with the order you've got listed above, you'll be heating both fuels via the FPHE (because it's after the pollack valve). Since you've got a cooler climate, you may want to do that anyhow..