I bought my first Honda a week ago from a friend of mine for $500 after it overheated on him and seized the engine.
2003 Honda Accord EX V6 3.0. 6th digit on Vin is a 6.

So I before I buy a 03 to 07 V6 3.0, wanted to know if the 03-07 3.0 is the only option I have, or is there a bigger Honda engine, like the odyssey's 3.5 that would fit in my Accord with no to minimum complications?

I downloaded a service manual published by American Honda Company Inc. An incredibly detailed manual that helped me take the old engine out.
Anyone here has experience to tell me if it is possible to put one in an Accord and/or what kind of modifications am I looking at? My main concern is the wiring, the under the hood plugs.


This is the current block

Thank you