[Michael C Henry]

FE rear mains are a little different .Originally they had a two half circle rear seals made with rope material. The rear bearing cap to block seal has two grooves one on either side also originally made from rope material. Fel-Pro makes a rear main seal kit that has two neoprene seal half circle crank seals and two neoprene wedges to seal the cap off to the block . These seals are a lot easierand almost fool proof to install . The wedges are installed by slipping them in to place ( making sure the wedges reach the bottom of the groove touching the block ) then a steel pin resembling a nail is inserted into the neopreen wedges V groove expanding it to fill the cap and block cavity. I'v seen a lot of the usual rope material not reach the bottom of the groove or be cut short around the crank so that when the crank turned a gap appeared and you have a leak. I use the Fel-Pro kit since 69.