I have R&R the pan with the engine in the car. As said, loosen fan shroud and let hang about the fan, lower rad hose is fine, dist cap is loose, and install 2X4 in engine mounts 4 inch side . Crank timing mark to around 5 o:clock position to get the counterweights into the block. If auto, remove dust cover for additional clearnace in removing pan. Man trans is limited by bellhousing, but can be done, Remove oil filter.
Replace crank seal and clean bearing cap and block with lacquer thinner or BraKleen®, then apply a small bead of RTV, 1/16 inch diameter or smaller from the backside of seal to pan gasket. One-eighth inch diameter bead about block to hold pan gasket to block. Rubber pan end gaskets get the same 1/8 inch diameter bead both sides. Install pan and torque bolts to manual specs, Let set overnight for RTV to cure, then pour in oil.
Pans do leak either from rust pin hole or a kink in the pan. Weld or braze pan after cleaning pan of oil, lacquer thinner again.