LT cams have a little doll pin that runs into the optispark thats why you can't use one
......and valve springs .Not hardly. The engines are completely different (even different firing order) and so are the parts (except for the lifters).
Yeah, the springs will fit, but they are not the same part number as the lifters are. But, we're both right.......and valve springs .
You lay a LS cam and a LT cam side-by-side, and you'll see immediately that the LS cam will not even fit in the LT engine......won't even fit.