The problem with just going off a picture on the internet is you don't have a good idea about ANYTHING on the car- not the suspension, not the tire size, nothing.
Here's a walk around video from when the car was still for sale at Gateway Classics. It's been converted to coil overs in the front and has a 6.1 hemi.
Here's the rear suspension though. Based on the number of leafs on those springs, I'd say there's a decent chance those are Hotchkis springs.
View attachment 1716161937
The other thing is, look at the arch on the spring. It still has some arch to it. That would indicate to me it's using a lowering front hanger. Because that's basically just a "zero arch" spring, which is what the factory springs were.
That car sits a little lower than mine, but, I don't have lowering springs on the back of my car. That's a zero arch AFCO spring on mine, my rear spring slider conversion lowers it a little bit vs the stock shackles. So with a Hotchkis front hanger it would likely sit just as low.
View attachment 1716161949
The other thing is, you're going from SS springs to -2 Eatons. The Eatons are a good spring no doubt, but if your car sits too low with them, well, you're pretty much out of luck. If you had a set of -1" springs and it didn't sit quite low enough, you could adjust the height with a small lowering block.