Man, those pictures bring back memories.
I spent a ton of time racing on those - a half-season on hull #1 ("pizzazz") when it was first launched, debugged, and then relaunched, and then several seasons on hull #7 ("seduction").
Surprisingly competitive against custom/one-off 3/4-tonners back in the day. Biggest competition was a custom Chance 33 called Eclipse, a semi-custom CF-33 called Stargazer, and a very well-sailed E34 out of Long Beach called Junkyard Dog. We got our share of pickle-dishes, including overall wins in the "66 series", and a number of solid wins in the old "tri-island" series, as well as a bunch of level-rating IOR regattas (e.g., the old SDYC "Ton Cup").
The E34 rated 144 in PHRF in SoCal, and pretty competitive in that too. Great fun to sail in anything except a pole-on-the-headstay reach (small-ish rudder allowed it to spin out a bit if you let it heel too much), and DDW with spinnaker and blooper (had the propensity for "high speed wobbles", as pretty much all IOR-designs of that era were prone to have).
About the only issue we ever had once the hull-#1 bugs were worked out was that the chainplates needed some attention. Chainplates were a big aluminum knee structure bonded to inside of hull and underside of deck (you can just make out the portside knee at the far left of picture #7 in the CL ad). On at least two hulls (that I know of), the bonding to the inside of the hull was insufficient and had to be reinforced. Not a small job. Probably fixed in later hulls (and a different structure entirely was used for the 34T).
Somewhere in the dark recesses of my garage I have a bunch of drawings for the 34, including the lines, offsets and deck plan. Plus the drawings I did for the "custom" deck layout we used on Seduction (different placements for winches and stoppers on the cabin-top, mostly, after learning some things about crew placement on hull #1). Owner of the boat was kind enough to grant me an "ownership share" in the boat in return for all the rigging work. Which worked out well - it meant he could put me on his insurance for deliveries, and it got me a set of keys to the boat.
...which had a great stereo, plenty of room for cold beverages, and a bunch of bean-bag chairs, a perfect setup for...uh... teenage activities. (hey, it was the 70s!)
Yeah, fond memories ;-)