Good info on the Delco piece, and good price!
Another option, if you want one to stay permanently installed, have AN fitting provisions, and look decent at the same time, try Lee Manufacturing-- they have a nice aluminum one with a replaceable element. I run one with my Hydroboost setup on the return line from the box to the reservoir.
Lee's number is 818-768-0371, they're in Sun Valley, CA.
PIC
Troy