if you have read my post about rebuilding my 05 RXP engine, maybe you can help me out here also. Instead of going through the hassle of rebuilding my motor I could also just buy a used motor. What motors would work for my application? If I have a 2005 4 Tec 215 SC engine can I use any of the 2004-2010 4 Tec SC engines? if not what are the differences? Are the shortblocks the same and they just use different heads?