Yes, I know. Been gone a long while. Was invited back by a new customer.
We have recently done a pair of the Edelbrock D-ports. If you want good power for a 400 but not much larger, the E-head is good. Nice quality. If you want power for a bigger engine, use the KRE d-port. Much more room in the walls and roof for porting. Both have a good HSC chamber.
Either way, buy them "bare" and install high quality hardware. Neither are really "ready to run" out of the box. A good head shop should clean the ports up, at minimum. Careful who you "listen" to, as well, as there are those "out there" claiming the best but nowhere near. The BEST Pontiac heads come from places other than the "traditional" Pontiac sources. Cerelli (AllPontiac's GrandAm), BES (Langer) and H&M (Goateus Maximus) are examples of GOOD porting shops that "also" do Pontiacs. These are the three Pontiacs at the very top of their particular "niche", including the quickest/fastest Pontiac on the planet.