Thanks Bill. The chassis is form the Fujimi 356, thought that would be more believable. I am on the fence about opening the body and creating a tube chassis back half. If I go that route I will use swing arm suspension similar to what Porsche used in the 550 from my research.
Do you have any insight as the how the 4-cam was mounted? I assume there where some sort of motor mounts but haven't been able to find photos.