Here is the donor engine. It was salvaged from a very low-mileage ’01 Chevy Silverado. The 4.8L V-8 is the smaller cousin of the very popular 5.3L engine found in so many GM pickups and SUVs. Both engines share the same block, and it’s difficult to determine which is which from an external viewpoint. So, many details of this YJ swap can also apply if you’re dropping in a 5.3L or 6.0L Generation III truck engine.