'01-'02 has ls6 intake/no egr
'01-'02 prone to piston slap and oil consumption issues
'01-'02 sail panel prone to bubbling issues
'01-'02 had slightly different cam than '98-'00
'01-'02 had 241 heads(center bolt)
'99-'00 center bolt heads, 853s I think.
'98 has perimeter bolt style valve cover heads
'98 has slightly different PCM
'98 has same injectors as '01-'02, '99-'00 were smaller
'98 has metal fuel tank?(I think)
'97-'98 LS1s had "weaker" rod bolts people claim
I'll update as I remember things...
or look here...
http://ls1tech.com/forums/new-ls1-ow...ml#post1740880