Technical chevy small block experts

If you have two SBC oil pans and the REAR seal areas are different, I believe you may have two completely different pans that are not interchangeable. The difference lies in the rear MAIN seal configuration of the engine itself. I am not positive on the year (either 86 or 87), the SBC changed the REAR MAIN seal from a 2-piece to a 1-piece and you must have the correct oil pan for the year of engine.

As for the front OIL PAN seal on a 4-piece oil pan gasket set (going of off memory here) ... put the oil pan on the block without gaskets. If you can fit a feeler gauge (without bending) between the oil pan and the timing cover, you need the thick FRONT gasket. If the feeler won't fit, you need the thin gasket.

 

Some people can **** up a one car funeral ,but......