Ok, that's the right name. I'll fill in the details, the ones you can find googling "John Lohrenz" and "schoc shell" combined with "Long Beach, California".
John W. Lorenz from Long Beach, California, used this Indy car racer, converted to road use, to promote his business: Shoc Shell Racing Helmets.
"built from a Kurtis Indianapolis Speedway racer.
Jim Rathmann drove the car under the colors of Sandy Belond in the 1955 Memorial Day 500.
Lohrenz built the auto primarily as a show car to advertise his helmets."
The file I have is barely readable but it seems Bill Stroppe was involved and it had an Offenhauser engine.
1 point for you and one for myself!