ok im puttin an new pan on my truck. an 86 k10. now i know the engine is not the origional..meaning not an 86...and i had this pan that was givin to me to put on the truck. well, this pan , in the front of it, has a much more deeper end to it if you know what i mean. and the holes are spaced farther apart, the front two main holes. any one know what year pan mine might be or what year engine for that matter judging on the pan?