Thoroughly inspect the new engine to be sure it is identical to the one being replaced
Clean any parts which are to be reused, including bolts.
Check all gasket and seal surfaces for damage, and clean these areas with a gasket scrapper or razor blade. DO NOT clean any surface with surface conditioning disks or abrasive pad/bristle devices (see the "Surface conditioning disks" article under General Information).
Prime the oil pump and be sure to replace the pickup tube and screen.
Follow instructions provided with the gasket set, only use gasket adhesive where required by the gasket manufacturer.
Inspect the radiator and cooling system and replace as necessary
Clean and flush or replace all filters and filter lines.
Fill the new oil filter with oil
Fill cooling system with new antifreeze and water in a 50/50 mixture, bleed cooling systems according to vehicle manufacturer guidelines.
Inspect and replace (as necessary) all parts listed under "Recommended parts to replace"