Originally Posted by Mars_302
I guess I should say engine codes for GMs are also based on their RPO or build codes. There was a Gen I LT1 as well as the Gen LT1
The codes are similar but different. A Gen. I would be an
LT-1, a Gen. II is the
LT1 or
LT4. (Which do share many internal parts with Gen I BTW)
And with the BB's it was an
LS-6 as opposed to the Gen. III
LS6