Help with choosing /6 build type for newbie

Wow pretty cool I just ordered the mallory HEI and coil also plug wires it was pricey but hope its good should i get that little red box to go with her. Any suggetions as far as windage trays that are high quality. I have seen Clifford valve covers on other cars didnt see it on there web site. I was on Aussie speed and they have what looks like a very nice valve cover.