is there a diffrence between a 3.8 radiator and a lt1 radiator?
Yes, the radiator cores have different part numbers for LT1, LS1, and L32/L36. Don't know what the differences actually are, but....
It seems from your earlier posts that you have a 96 3.8L V6. The 3.8L (L36) does have the same part as the 3.4L (L32). 

