sr20det redtop with hicas pump?

[zackt69]

I have an sr20det with a hicas pump that I'm trying to put into my 89 s13 that originally had a non hicas pump. I have an extra connection on the new hicas pump and I'm wondering if I need to get a new non hicas pump, or if I can block off one of the holes without a problem. If I can block off a hole, would it be the one one the rear of the pump? I also have the DOHC steering lines swapped in. I've searched and can't find any good answers or pictures.

Thanks!