The only difference I've been able to determine with absolute certainty between FE1 and FE3 suspensions is upgraded rear shocks. But I do suspect that the struts were upgrades too.

You might think springs would be different, but that could get really complicated, because knowing GM, I might expect springs to vary across model years and even on the Panel models, as well. I really have no idea.

I started to research this suspension stuff and collected some data, but that effort stalled. Maybe someday.

 

Discussion moved.

 

So, being the LS came standard with 2.2 litre , then all LS were 2.2
Thank you for correcting my mistake about the 1LT and 2LT