Always replace the 303355 gasket and 303347 o-ring (inside the carbon seal) Original 303356 plates were made of brass and wore badly. Dealers were to told to replace them with the stainless steel one (same number). Your choice–you can also use the brass one if it is in decent condition—or smooth it out with some sandpaper. 303391 carbon seal should be ok unless it is broken (fragile). Spring normally should also be ok. Finally, the lower spring retainer is ok if the drive bumps haven’t worn off the bottom. Glue the gasket to the plate so the plate doesn’t spin (847 Sealant is excellent for that putpose)
