Despite the title suggesting so, there never was a "Surf I".
The trash in the garbage eating sequence was actually gelatin molded into different shapes.
Originally announced as a 3-D production in Variety 1982, hyping actress Linda Kerridge at the Cannes film market. The movie was subsequently filmed without the 3D gimmick, though some setups do seem to be set up to take advantage of 3D photography.
Some of the items removed from the Zombie Surfer's digestive tract include: a carburetor, "J Hoffa's" underwear, a wooden plank with "ORCA" written on it (an homage to Jaws) an Audio Tape, a mirror, and a sting ray.
There is a director's cut on the Blu-ray disc that runs 100 minutes.