Pretty sure the rear main seal is the only one that is different. The front seal is a simple lip-type seal.
Before ripping the motor down, you might try an old outboard motor trick for removing seals in place: Drill a series of 1/8 " holes in the metal body, insert sheet metal screws, and gently pull on one at a time. If the seal comes out you only have to tap in a new one. And if the shaft is grooved where the lip rides, be sure to first insert a plastic spacer washer (cut from sheet material) that will space the seal out a 1/16 " so it will ride on a good shaft area.
Jeff
PS: If you remove the timing cover. make a diagram of it first and label every damn bolt that comes out! Take your time and don't omit this step or you'll go nuts trying to get the right bolt back where it belongs.
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell