Robert,
8x12 for the sidepod is a safe bet. The decal I use on the engine cover is 3 inch high lettering, and 30 inches wide. I fit it on the curvature of the engine cover area.
Here now, for your enjoyment (laughing is allowed) is a copy of a handwritten decal map I made while pouring over a car at the Sebring shop a few years ago. You might not be able to read all the handwritten text, but feel free to ask questions.
