Can anyone recommend a good source?

 

Paul grant would be a good place to start his contact info will be found in the admins signature. Good quality and good price source.

 

Could I install an 4.0 from an 02?

 

Why is your 4.6 not usable?

 

Get a 4.0, and have it rebuilt with your 4.6 internals.

 

jfall I think so. I have to do a little more investigating to make sure. But I think the block is cracked. I have redone the head gaskets and it was fine for about a month. Then I would start getting higher temps. I think I am getting exhaust gas in coolant.

 

Marty aka drillbit has one for sale right now 04 4.6 non SAI with 80k on it 270 576 79 two two. otherwise call Paul Grant and see if has one lined up for you 203 770 16 nine nine