Thanks for the response, familiar with the traditional Lotus suppliers. Sports Car World seems to have disappeared, at least on the internet. As I understand, Redline in the UK has taken over the Caterham parts? But the Lotus Seven S4 appears to be the orphan Seven. Not much information on them. Is there an S4 site? Or perhaps some type of interchange or technical site out there? I know the front suspension is Europa, rear axle is front load English Ford, probably 2000E trans. Some Twin Cams, others Crossflow. Who does the body parts? WIndshield frame? Tops? Other parts? Thanks, Mr.vman in Arizona