Re: '99 Chevy Quigley: what to do fix during engine swap?
Not sure on parts to replace, but if it was me I would do everything to add more power while its out. Performance pulleys, electric fan, consider headers, and throttle body spacer. Any bolt on that works basically. Update/replace core ignition components like spark plugs and wires and maybe a new coil. An oversized oil pan would help too, but need to be carful it doesn't get in the way of the 4wd components.
Curious......did they have to separate the body from chassis to remove the engine?
2002 Chevy 3/4 ton Explorer Conversion Van with Quigley IFS.