I own 1980 Z28 and few months ago I uploaded what seems like the casting number of my engine - 3956618 People figure it out from the pics and I saw it can be various engine types. The last owner told me it's a rebuild 350 but I don't trust him since his knowledge about cars is the same as my knowledge at rocket science... well.... Is there any outside differences between the 302 and the 350 from the outside? Is there's anyway to tell by the outside what's the engine size? If not. What's the easiest way I can check exactly for the engine without dissemble it too much. I added the pics again. No cowl tag and that's all the numbers and letters that are on the engine. I want to order some engine parts and I'm not sure how and what to look for. I am sure that I don't supposed to look for 80 350 sbc engine parts.