Installing a new tank in our RR .
To simplify the system, (this on a 99% street 620 HP big block)
can we block the 4 nipples coming from the tank that was part of the emission set-up?

WE are using an electric pump sucking from a 3/8" sending unit with a 1/4 " return nipple
we are not using either.

Does this now require a different filler cap (vented or not). EDIT: In rethinking, I guess a vented cap is required....

Any other considerations we should be aware of?

Thanks, Joe