The stud kit will work OK, I had the same questions as you when mine arrived from IPP, part number for a L24/L26/L28 but boxed for an L20, I'll take and post some pics. for you in the next few days.
One thing to note, the standard oil pan will clear the longer studs no problem, but if your using an alloy oil pan like me you will have to remove a small amount of material from the inner rear area of the pan to clear the stud ends as the alloy pan has a slightly different profile to the pressed steel pan.
Tim