ecu's have a series of digits on them, not what yours says.
see here:
http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg
The second set of #'s (p2p,p2e,p72 here) is the ecu ID.
An ls ecu would read p75 or p74
(A pic of what you found would help)
And no, it wouldnt help your motor