Yeah, springs off a 6 cylinder are stiffer to support the extra weight of the 4.o liter engine. Side by side the springs from a 4 cylinder and 6 cylinder are the same height but the springs are much stiffer on the 6. Your SE could get close to an inch by swapping out some 6 cylinder springs. Here is a copy of post I made some time ago. Might make for good reading. Check out the link regarding spring part numbers for Jeeps:
I replaced my old SE springs with 117,000 miles with springs off a newer Sport (8,000 miles on them) and it lifted my Jeep 3/4". A good rule of thumb is if you go up 2 part numbers you will get around 3/4" to 1" of lift.
In the front I went from 126 to 129
In the rear I went from 103 to 105
Not all Rubicon springs are the same so you need to find out the part number. Some Rubicons have the same springs as other models. This is a good thread to read:
I also added daystar 3/4" spacers to give me a total of 1 1/2" of lift.
When I sat my new and old springs side by side they were the same height so any lift you get will be because of the stiffness of the Rubi springs. I haven't noticed any differnce in the ride quality but I did replace my 7 year old stock shocks with newer factory shocks so that might have helped the ride quality to even things out in the ride department.
98' SE, Chili Pepper Red, grizzly wheels, 126AA/103AA to 129AA/105AA coil swap, 3/4" spacer, 31 Yoko Geolander AT, soft top, rear view mirror turned upside down, door straps twisted, rubicon wipers, optional factory rear sway bar, doors & top on.
Low Output 4 Cylinder Jeep Club Member #1
06' Grand Cherokee Limited, 4.7 liter V8
99' Grand Cherokee Limited, 4.7 liter V8