I never said they were. The sealed tank is going in the fan vented trunk with flush cap Holley EFI 12 bolt hat. You could use a 5 hole EFI pump/vent/return unit and a LeMans sealed cap with tank in original location.
Ed’s “add a fuel hat“ sounds good and I can put cell foam and a pickup tube anti-starvation dam thru the hole.
Cut off and seal filler tube and vent. No EGR pump.
The tanks are made by Tankcraft in Wisconsin and they are heavy duty might as well use it.
Velcro to hold it down
