You might think about moving this Q to the TJ forum... IMO that's where the help is likely to come from.
I recently installed an OME lift on my 2001 TJ (4.0 auto, hardtop, winch, sliders). It's not nearly the same vehicle as yours, but I am quite glad I did NOT go with the heavy duty springs. I did pony up for the more expensive shocks though, and I'm glad I DID.
Talk to DPG-offroad and they will give some great advice on this. They were fantastic, and took nearly an hour to discuss my jeep and my preferences with me. I couldn't be happier with the kit they sold me.
Yes, that's what I went with. Great ride... Street handling is similar to stock, except maybe a tad more firm (but not harsh). I wasn't interested in street handling anyway. It's on the washboard and rocky trails that I can really feel the difference. I couldn't be happier.
It depends on how much weight you are carrying. I started off with 942 springs, then went to 949's and ultimately with 996's. I have the previous two sets of rear springs for sale btw, along with a set of shocks.
Mine's not an LJ, but I went with the HD springs (942's) anticipating rear tire carrier, gear etc. Going on 6 years now, and still don't have the rear tire carrier. Been pleased with the ride so far. No sagging what so ever and the ride is not harsh. They didn't have the sport shocks when I bought my lift, so regular shocks going on 50k miles.
I would opt for the HD springs. I dont want to have to put spacers in when it levels out.
On my TJ i installed the OME LJ/ZJ kit. Much heavier duty than just Heavy duty.
Got about 3.5" lift out of it - which it has settled down a bit now. No dip in the front end after steel bumper and winch.
I think I even got enough clearance for 35s....
Stock 2003 Jeep TJ - 'Intense Blue'
Bought the jeep in April, found JF in May...
First Mod in June.
Your Jeep is heavier compared to a regular TJ - you need the HD rated kit/line.
1998 TJ Moss [COLOR=darkgreen][B][SIZE=3]Green[/SIZE][/B][/COLOR] Sahara w/ numerous scratches & dents whose playground is on a tropical island that's 33 miles long and 4-12 miles wide, in year-round 82 degree weather.