Can someone tell me which sending units are for what? I have a 86 305 carborated engine. It has about 4 or 5 on it. There is one in the right side head,two on the rear of the intake and one on the right side of the block.The engine is a LE9 and came out of a pickup. I think it had guages becouse some of the sending units are kind of large.I would appreciate any and all help. Thanks:confused: