LS1= first gen, in camaro and firebird 5.7 ltr 346 ci i think rated between 300-320 hp? 97-04 corvette, 345-350 hp.
LS6= 01-04 Z06, rated @ 385-405 hp 5.7 ltr, 346 ci.
LS2= 2005-2007 corvette, 6.0 ltr 400hp
LS3= 2008 to present vette, camaro, 6.2 ltr, 430-436 hp?
LS7= 2006 to present...