Question on a eMachine

[LUZR4LIFE]

I am going to order a new mobo etc. for a eMachine t3624 for a client. I have never replaced a mobo in a manufactured PC as was wondering if there will be a issue with the mobo fitting in this PC. the old mobo is 8.2 by 9.2 and the case is 10 ver. and 9.5 hor. So I believe that there will be no issue with it fitting. I just want some opinions. Also, this setup doesn't come with a heatsink so I have a AM3 heatsink from my 550 and from what I have read, that all AM2, AM2+ and AM3's will work with each other. Is this true.

Thanks

[LUZR4LIFE]

I ended up going to MicroCenter and and got a GigaByte M68m-SP2 along with a 555BE and 1X2G Crucial DDR800. I took the 555BE and replaced with my 550BE. Everything fit in the "e-Machine fine and all is good.