ls swap headers that will clear with a 2.5" z

[bdydrppup]

OK guys. I've been lurking here for years but finally had a question I couldnt find a clear answer. I'm putting an 06 LQ9 in my 84 c10. I'm using the transdapt 4572 with stock clamshells. I bought the schoenfeld swap headers but they were a no go. Hit my drivers side lower control arm(big beefy air ride tech arms) and hit my passenger side floorboard( the truck is z'd 2.5"). So I'm thinking the Hedman swap midlength may work. It's so hard to get a straight answer on what fits then it throws a wrench in it with the z. My carbed 350 was running stainless midlengths and fit good. Any ideas?! lol