Originally Posted by 95LSv
You don't really have to change the pumps. But a GSR oil and water pump is better than ls. Get type r if u got the money. Resurfacing the head is necessary to ensure that everything is sealed good. Honing pretty much makes the engine like new. it cleans the block on the inside... Hope that helps
GSR and Type R oil pumps are the same exact thing.
Honing doesn't clean anything. It creates a rough surface on the cylinder walls so that new rings will seal correctly.