OK my question is in Common blocks I have a 1990 Omni with a 2.2 TBI all factory and I assume it will be a common block, but I thought that common blocks have a large "C" Stamped on the block in the front under the thermostat housing general area, I went out to check my block today to see if the "C" was there it is not there so I am wondering it the common block only refers to turbo engines? cause mine being a 90 and not have the "C" on it ,or is this "C" not referring to a common block.......
Thanks